Convert Mixin config files and obsolete mod logic into maps

[WaitingIdly]

changes in this PR:

• converts the current pattern of "add mixin file to list in one function, then add mixin file & option to switch statement in different function" into "add mixin file and option to map". this has multiple improvements:
  • dont have to write the same config name twice
  • easier to determine where to add the config for a map compared to an if statement
  • fixes a(t least one) mixin having the incorrect name and thus always being active
• does a similar thing to obsolete mods
• because you can obtain the mod name if it is installed and you have the modid, and the name is only displayed if the modid is enabled, replaced the explicit mod name with a programmatic version.

i believe these changes are desirable because it improves readability, maintainability, and decreases duplication.