feat: add dictionary for overrides based on feature tags to options

[Qubus0]

adds a dictionary for overrides based on feature tags to options.

I had to modify ModLoaderLog a little to avoid crashes when the store - and the options themselves in the store - are not available yet, which is the case in the options loading method.

needs to be documented on the options page after merge to main

# Overrides for all available feature tags through OS.has_feature()
# Format: Dictionary[String: ModLoaderOptionsProfile] where the string is a tag
# Warning: Some tags can occur at the same time (Windows + editor for example) -
# In a case where multiple apply, the last one in the dict will override all others

https://docs.godotengine.org/en/3.5/tutorials/export/feature_tags.html

closes #296

[KANAjetzt]

Nice - Thank You!
Tested it in Editor with windows and editor flag.