Autocomplete Options in flowR repl

[EagleoutIce]

After #249, it would be nice if when typing :slicer, the repl would allow to autocomplete based on the options of the slicer.
For this, it would be nice, if the command line options are linked in the scripts-info.ts.

[EagleoutIce]

So in other words, I would want the following:

$ node dist/src/flowr.js
:sli<tab>
:slicer
:slicer <tab>
  -h, --help ...
  -d, --diff ...

With <tab> representing the tab key for the autocompletion.

[EagleoutIce]

The magic happens in the replCompleter at:

https://github.com/Code-Inspect/flowr/blob/75a417d913092e10cee2c27a251f9984ca35cf3b/src/cli/repl/core.ts#L19-L21

[EagleoutIce]

https://nodejs.org/api/readline.html#use-of-the-completer-function_1

[Ellpeck]

• for commands: autocomplete file:// protocol and then relative files
• add an empty string to the autocomplete so that it doesn't force you to do the path or single dash
• open an issue for using a library that allows displaying comments next to the autocomplete options
• add a space after autocompletes so that they immediately allow autocompleting again