feat: ✨ ModLoaderStore: New singleton to store data

[ithinkandicode]

Adds a new singleton called ModLoaderStore, which comes before ModLoader in the autoload order. This new singleton is a data store, and lets us reference data that was previously held as local vars in ModLoader, and which therefore may not have been accessible to all methods due to ModLoader not being initialised during its _init() phase.

I have implemented the following:

• Create the new ModLoaderStore singleton (closes #161).
• Moved some local variables from ModLoader to ModLoaderStore (closes #161).
• Implemented the path override options that were missing from the recent ML Options work (follows #145).
• Implemented the option to disable mods by mod ID strings (via #160).
• Options data can still be overridden by options.tres, but the stored data can also now be overridden by CLI args (with CLI args having priority).
  • This means we have one primary place to get/set data, and we don't need to keep checking CLI args (eg. for log verbosity levels, which previously checked the CLI args every time a log was used).
• New utility funcs to get critical paths have also been added, which apply the overrides, so you don't need to check for overrides every time you get the mods/configs/workshop paths:
  • ModLoaderUtils.get_path_to_mods
  • ModLoaderUtils.get_path_to_configs
  • ModLoaderSteam.get_path_to_workshop (renamed from get_steam_workshop_dir to match this new convention)
• Renamed path override options in options.tres to override_path_to_* for consistency
• Updated the setup process to include ModLoaderStore
• Updated the autoload order check, and added a new utility method called check_autoload_position to a new class called ModLoaderGodot

Notes:

• ModLoader still has lots of other local vars that we may want to move to ModLoaderStore. We may also want to provide utility funcs to retrieve this data, eg. is_mod_active(mod_id: String), but all this can be handled in subsequent PRs.

Closes:

• Store certain local variables in a dictionary (detailed notes) #146
• ModLoaderStore - Singleton for to store data #161
• ML Options: Disable certain mods #151

Works towards:

• Add option to disable certain mods via JSON #109
• Logging: Track logged messages #140
• Logging: Add arg for only_once #141

Finishes:

• feat: ✨ ML Options: Add the groundwork for loading custom options #145
• refactor: ♻️ API: Move Config to a dedicated class #157 (addresses the issue mentioned here)

Subsequent Work

As raised in the review comments, there are a few things that we can do following this PR:

• The things noted in the "works towards" section above can be addressed (eg via)
• mod_loader_setup.gd - The new autoload check can be used here (via)
• REQUIRE_CMD_LINE - This could be a configurable option (via)

[Qubus0]

Very nice work

[KANAjetzt]

Some minor stuff, but if everything is setup correctly it works flawless 👍
Thanks Darkly great work 🥇

[Qubus0]

This is the one

[KANAjetzt]

Nice work - tested and approved 👍