refactor: ✨ (#418)

* refactor: ✨ move in one commit

Eveything in modules should probably be changed to `exported` defs.
The idea is to move everything first to keep proper history.

* refactor: 📝 add modules readme (wip)

* refactor: ✨ small move

* refactor: 📝 changed nestring, updated modules readme

* refactor: 📝 to document or not to document

* fix: 🐛 themes

replaced the template to use `main` and regenerated them
from lemnos themes.

* Revert "fix: 🐛 themes"

This reverts commit 4918d3633c8d2d81950a0ed0cfd9eb84241bc886.

* refactor: ✨ introduce sourced

- Created a source `root` in which sourcable demos are stored.
  Some might get converted to modules later on.
- Moved some files to bin too.

* fix: 🐛 fehbg.nu

* fix: 🐛 modules/after.nu

* moved some other stuff around

---------

Co-authored-by: Darren Schroeder <343840+fdncred@users.noreply.github.com>

modules/base16/README.md

@@ -0,0 +1,48 @@
+# Base16 themes integration
+
+This folder contains a couple of files that let you configure Nushell and other terminal tools to use base16 themes.
+
+## Requirements
+
+Assumes a Linux system with an X-based window manager.
+Specific packages and environment variable requirements are listed in each file.
+
+## Files explanation
+* **base16.nu** - Main module -- see comments inside
+* **auto_base16.nu** - Generates a base16 theme from a wallpaper
+* **alacritty_colors.template** - Template for Alacritty terminal colors
+
+## Example integration
+
+Fist, set up base16 theme generation from a wallpaper:
+```
+# ~/.xinitrc
+
+...
+
+[ -f ~/.auto_base16.nu ] && ~/.auto_base16.nu &
+```
+This will generate a base16 theme to a file from a current wallpaper.
+You can combine this with a random wallpaper generation using the fehbg.nu
+script for more chaos fun.
+
+Next, set up Nushell config, assuming the base16 colors are generated
+```
+# config.nu
+
+use ~/.config/nushell/base16.nu
+
+# File containing base16 colors
+let-env BASE16_TXT = "/tmp/base16.txt"
+
+let config = {
+    color_config: (base16 build-nu-config $env.BASE16_TXT)
+}
+```
+
+To select a new wallpaper and regenerate the base16 config:
+```
+> base16 new-wallpaper
+
+> source ~/.config/nushell/config.nu
+```