Nupass refactor 20230501 (#473)

* Refactor nupass.nu

Major refactor for more flexibility

To allow number of words to be specified, one solution is to add random 
words, symbols, & numbers to lists, then operate on the lists.
You can combine lists with the ++ operator, then use shuffle on them,
as well as various other methods.

* Update ReadMe.md

Updated to match latest version, adding some new sample commands

Last version `nupass 4` meant "generate password with 3 words of length <=4".
This version `nupass 4` means "generate password with 4 words".
Length can be specified with `-l`, so: `nupass 4 -l 8` means "generate password with 4 words of length <=8".

* Update ReadMe.md

Screenshot showing new version's output

sourced/misc/password_generator/ReadMe.md

@@ -1,6 +1,6 @@
 # Nushell Password Generator "nupass"
 
-This nushell command randomly retrieves three words from a dictionary file (English with Japanese words added by @rickcogley) less than or equal to a given parameter's length, formats the words randomly with capitalization, then separates the words with some random symbols and numbers to return a password.  
+This nushell command randomly retrieves a specified number of words from a dictionary file (English with Japanese words added by @rickcogley) less than or equal to a given parameter's length, formats the words randomly with capitalization, then separates the words with some random symbols and numbers to return a password.  
 
 To use:
 
@@ -20,10 +20,11 @@ http get https://raw.githubusercontent.com/RickCogley/jpassgen/master/genpass-di
 let dictfile = $"/path/to/my/genpass-dict-jp"
 ```
 
-5. Confirm the symbols are what you want to use, and edit to taste: 
+5. Confirm and edit the default symbols list and diceware delimiter: 
 
 ```
-let symbolchars = "!@#$%^&*()_-+[]"
+--symbols (-s): string = "!@#$%^&()_-+[]{}" # Symbols to use in password
+--delimiter (-m): string = "-" # Delimiter for diceware
 ```
 
 6. Load the script with `use` in your `config.nu`, something like: 
@@ -40,12 +41,16 @@ Reload nu, then run it to test:
 nupass -h
 nupass 5
 nupass 6 --debug
-nupass 3 -d
+nupass 8 -v diceware
+nupass 8 -v diceware -m _
+nupass 4 -v mixnmatch
+nupass 6 -v alphanum
+nupass 5 -l 8 
 ```
 
 ### Testing
 
-If you're making changes to the script while testing, just re-source the script by doing: 
+If you're making changes to the script while testing, you can just re-source the script by doing: 
 
 `use nupass.nu`
 
@@ -53,7 +58,7 @@ If you're making changes to the script while testing, just re-source the script
 
 ### Caveats
 
-I've been scripting for quite a long time, but not in nu. Input appreciated to make this more nu-esque!
+I've been scripting for quite a long time, but not in nu. Input appreciated to make this more nu-esque! The script is in a decent place as of the 20230501 version.
 
 Obviously you can just use the `random chars` or `random integers` commands but I like to have words I can read in my passwords, and I think those generated by this script have sufficient entropy. 
 
@@ -61,6 +66,7 @@ This command doesn't let you specify a precise length.
 
 ### Acknowledgements
 
-Thanks everyone on Discord for putting up with and answering my nubie questions @amtoine, @fdncred, @jelle, and for the feedback after try number 1. 
+Thanks everyone on Discord for putting up with and answering my nubie questions @amtoine, @fdncred, @jelle, @sygmei, @kubouch and for the feedback after try number 1. 
+
+<img width="576" alt="image" src="https://user-images.githubusercontent.com/512328/235383307-d3f3d65d-c184-4dfa-9fe9-677b677d8531.png">
 
-<img width="1041" alt="image" src="https://user-images.githubusercontent.com/512328/231930563-4da63f8c-d9de-4620-901e-a39ed32b049f.png">