/sk Command Rework

[erenkarakal]

Problem

The current way the /sk command is written makes it nearly impossible to add new features, fix bugs, or even tell what's going on.
There are also lots of issues created for the /sk command that were untouched for a long time.

Solution

Deletes the old SkriptCommand and SkriptCommandTabCompleter classes and replaces them with a new SubCommand class.
To add a new SubCommand, you create a new class for your command and extend SubCommand:

class MyCommand extends SubCommand {

	public MyCommand() {
		super("command", "aliases");
	}

	@Override
	public void execute(@NotNull CommandSender sender, @NotNull String @NotNull [] args) {
		// /sk command or /sk aliases
		sender.sendMessage("You ran this command.");
	}

	@Override
	public List<String> getTabCompletions(@NotNull CommandSender sender, @NotNull String @NotNull [] args) {
		return List.of("tab completions");
	}

}

Then, add your subcommand inside the new SkriptCommand class

For commands that share a lot of code, such as /sk enable | disable | reload, a new ScriptCommandUtils class was added as a utility class.
This approach makes it way easier to work on anything related to the /sk command.

Full Changelog

• New system for subcommands
• SkriptConfig.load() is now public (marked as internal)
• /sk help now groups same subcommands with different aliases. (Missing skript command.help.show #7606)

- list - Lists all enabled and disabled scripts
- show - Lists all enabled and disabled scripts
+ list/show - Lists all enabled and disabled scripts

• Added a new /sk recover command that dumps all scripts in memory to files, useful for recovering accidentally deleted scripts.
• Added a new /sk parse <code> command that works the same way as effect commands do, except they don't have to be enabled through the config. (parse effect subcommand #6899)
• Node#getComment and Node#getIndentation were made public for /sk recover (marked as internal)
• Added missing [Skript] prefixes in /sk reload (Skript errors missing prefix in dev/feature #7297)
• Server version in /sk info is now more detailed:

- 1.21.8-60-29c8822 (MC: 1.21.8)
+ Paper 1.21.8 #60 (29c8822)

• Added proper support for enabling, disabling and reloading symbolic links (Add Support for Symlink Files and Folders in /sk Command #7703, /sk tab completions break in symlinked directories #6825)
• When enabling disabled scripts, tab completions now also show the script name without the disabled prefix (Ignore first hyphen in /skript enable #7666)
• Added /sk reload last for reloading the last reloaded script. The saved last script is global
• Fixed wrong colored error messages when reloading files (Reloading all scripts returns green when errors are encountered #6425)

TODO List

• Allow disabling deleted/renamed scripts
• Add support for reloading multiple scripts at once (Multi Script Reload #7569)
• Add a config option for reload notify (Reload Notify Config #7193)

I created this PR early to get initial feedback on the new structure, and so that people can recommend changes on the old command code. If you have any suggestions for new commands, drop them here.

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Completes: none
Related: none

[Efnilite]

i like the new structure, good work 🙏

[sovdeeth]

some sections look unfinished with todos or just stubs, is that intentional?
Missing a lot of documentation but otherwise seems pretty good