Add the possibility to include a default/preset profile

[KANAjetzt]

Add the possibility for the game dev to ship a predefined user profile that applies on the first load.
This allows including inactive example mods that the player can activate if desired.

Todos

• Add custom_default_profile to ModLoaderOptionsProfile
• Add custom_default_profile to ModLoaderStore.ml_options
• Add check for custom_default_profile in ModLoaderUserProfile._load()
• Add @export for ModUserProfile
  • Subclass for mod_list (exporting the Dictionary is not ideal)

[KANAjetzt]

Change of plans. Defining a preset user profile is a pain, so I changed the way the disabled_mods setting works to still load the mod into mod_data. This way, the metadata is accessible for mod menus.

• refactor: ♻️ Changed disabled_mods setting to load metadata #394