Move completions to module format (#195)

* Move custom completions to module format

* Describe usage in README of custom completions

custom-completions/cargo/README.md

@@ -1,5 +1,10 @@
 # Cargo Custom Completions
 
-### Definition
+This script provides custom completions for cargo.
+It can be used by importing its exported commands via:
 
-These scripts should be used to demonstrate how create custom completions for cargo.
+```
+use path/to/cargo/cargo-completions.nu *
+```
+
+With `path/to` being either the relative path of the file to your current working directory or its absolute path. 

custom-completions/cargo/cargo-completions.nu

@@ -23,7 +23,7 @@ def "nu-complete cargo features" [] {
   open Cargo.toml | get features | transpose | get column0
 }
 
-extern "cargo run" [
+export extern "cargo run" [
   ...args: any                                      # arguments
   --bin: string@"nu-complete cargo bins"            # Name of the bin target to run
   --example: string@"nu-complete cargo examples"    # Name of the example target to run

custom-completions/git/README.md

@@ -1,5 +1,10 @@
 # Git Custom Completions
 
-### Definition
+This script provides custom completions for git.
+It can be used by importing its exported commands via:
 
-These scripts should be used to demonstrate how create custom completions for git.
+```
+use path/to/git/git-completions.nu *
+```
+
+With `path/to` being either the relative path of the file to your current working directory or its absolute path. 

custom-completions/make/README.md

@@ -1,5 +1,10 @@
 # Make Custom Completions
 
-### Definition
+This script provides custom completions for make.
+It can be used by importing its exported commands via:
 
-These scripts should be used to demonstrate how create custom completions for make.
+```
+use path/to/make/make-completions.nu *
+```
+
+With `path/to` being either the relative path of the file to your current working directory or its absolute path. 

custom-completions/make/make-completions.nu

@@ -14,7 +14,7 @@ def "nu-complete make" [] {
     ls **/*|where type == dir|get name
   }
 
-  extern "make" [
+  export extern "make" [
     command: string@"nu-complete make"
     --always-make(-B)                                 # Unconditionally make all targets.
     --directory(-C): string@"nu-complete make dirs"   # Change to DIRECTORY before doing anything.
@@ -53,4 +53,4 @@ def "nu-complete make" [] {
     --new-file: string@"nu-complete files"            
     --assume-new: string@"nu-complete files"          
     --warn-undefined-variables                        # Warn when an undefined variable is referenced.
-  ]
+  ]

custom-completions/npm/README.md

@@ -1,5 +1,10 @@
 # NPM Custom Completions
 
-### Definition
+This script provides custom completions for npm.
+It can be used by importing its exported commands via:
 
-These scripts should be used to demonstrate how create custom completions for npm.
+```
+use path/to/npm/npm-completions.nu *
+```
+
+With `path/to` being either the relative path of the file to your current working directory or its absolute path. 

custom-completions/winget/README.md

@@ -1,5 +1,10 @@
 # Winget Custom Completions
 
-### Definition
+This script provides custom completions for winget.
+It can be used by importing its exported commands via:
 
-These scripts should be used to demonstrate how create custom completions for winget.
+```
+use path/to/winget/winget-completions.nu *
+```
+
+With `path/to` being either the relative path of the file to your current working directory or its absolute path. 

custom-completions/winget/winget-completions.nu

@@ -1,14 +1,14 @@
 # Written by Genna
 
 # Windows Package Manager
-extern winget [
+export extern winget [
     --version(-v): bool, # Display the version of the tool
     --info: bool, # Display general info of the tool
     --help(-?): bool, # Display the help for this command
 ]
 
 # Installs the given package
-extern "winget install" [
+export extern "winget install" [
     query?: string@"nu-complete winget install name",
     --query(-q): string@"nu-complete winget install name", # The query used to search for a package
     --manifest(-m): path, # The path to the manifest of the package
@@ -99,12 +99,12 @@ def "winget show" [
 }
 
 # Manage sources of packages
-extern "winget source" [
+export extern "winget source" [
     --help(-?): bool # Display the help for this command
 ]
 
 # Add a new source
-extern "winget source add" [
+export extern "winget source add" [
     --name(-n): string, # Name of the source
     --arg(-a): string, # Argument given to the source
     --type(-t): string@"nu-complete winget source type", # Type of the source
@@ -142,26 +142,26 @@ def "winget source list" [
 }
 
 # Update current sources
-extern "winget source update" [
+export extern "winget source update" [
     --name(-n): string, # Name of the source
     --help(-?): bool # Display the help for this command
 ]
 
 # Remove current sources
-extern "winget source remove" [
+export extern "winget source remove" [
     --name(-n): string, # Name of the source
     --help(-?): bool # Display the help for this command
 ]
 
 # Reset sources
-extern "winget source reset" [
+export extern "winget source reset" [
     --name(-n): string, # Name of the source
     --force: bool, # Forces the reset of the sources
     --help(-?): bool # Display the help for this command
 ]
 
 # Export current sources
-extern "winget source export" [
+export extern "winget source export" [
     --name(-n): string, # Name of the source
     --help(-?): bool # Display the help for this command
 ]
@@ -263,7 +263,7 @@ def "winget list" [
 }
 
 # Upgrades the given package
-extern "winget upgrade" [
+export extern "winget upgrade" [
     query?: string,
     --query(-q): string, # The query used to search for a package
     --manifest(-m): path, # The path to the manifest of the package
@@ -287,7 +287,7 @@ extern "winget upgrade" [
 ]
 
 # Uninstalls the given package
-extern "winget uninstall" [
+export extern "winget uninstall" [
     query?: string@"nu-complete winget uninstall package name",
     --query(-q): string@"nu-complete winget uninstall package name", # The query used to search for a package
     --manifest(-m): path, # The path to the manifest of the package
@@ -304,7 +304,7 @@ extern "winget uninstall" [
 ]
 
 # Helper to hash installer files
-extern "winget hash" [
+export extern "winget hash" [
     file?: path, # File to be hashed
     --file(-f): path, # File to be hashed
     --msix(-m): bool, # Input file will be treated as msix; signature hash will be provided if signed
@@ -312,26 +312,26 @@ extern "winget hash" [
 ]
 
 # Validates a manifest file
-extern "winget validate" [
+export extern "winget validate" [
     manifest?: path, # The path to the manifest to be validated
     --manifest: path,  # The path to the manifest to be validated
     --help(-?): bool # Display the help for this command
 ]
 
 # Open settings or set administrator settings
-extern "winget settings" [
+export extern "winget settings" [
     --enable: string, # Enables the specific administrator setting
     --disable: string, # Disables the specific administrator setting
     --help(-?): bool # Display the help for this command
 ]
 
 # Shows the status of experimental features
-extern "winget features" [
+export extern "winget features" [
     --help(-?): bool # Display the help for this command
 ]
 
 # Exports a list of the installed packages
-extern "winget export" [
+export extern "winget export" [
     output?: path, # File where the result is to be written
     --output(-o): path, # File where the result is to be written
     --source(-s): string@"nu-complete winget install source", # Export packages from the specified source
@@ -340,7 +340,7 @@ extern "winget export" [
     --help(-?): bool # Display the help for this command
 ]
 
-extern "winget import" [
+export extern "winget import" [
     import-file?: path, # File describing the packages to install
     --import-file(-i): path, # File describing the packages to install
     --ignore-unavailable: bool, # Ignore unavailable packages