Add InControl mixin to fix various stat doubling

[jchung01]

Fixes onjoin rules in spawn.json and summonaid.json causing repeated stat modifications if using the health/speed/damage actions. Mixes into McJtyTools, which is an embedded library of InControl by jar-in-jar, so added a Maven repo to add it to the dev environment separately.
This implements McJtyMods/McJtyTools@9cd16506, which was never included in an official InControl version.
Should fix McJtyMods/InControl#223, among many of the other duplicate issues.

[what-the-diff]

PR Summary

• Updated README.md documentation
  The README.md file now includes a newly introduced fix related to the "In Control!" mod, specifically concerning spawn rules.

• Added Dependencies
  New dependencies for "mcjtytools" and "incontrol" have been added to the dependencies.gradle file.

• Introduced Debug Flag
  A debug flag for "incontrol" has been added to the gradle.properties file for easier debugging.

• New Maven Repository
  A new Maven repository for "McJty Tools" is added in repositories.gradle.

• New Configuration Category
  A new configuration category for the mod "In Control!" has been introduced in the UTConfigMods.java file.

• Spawn Rule Stats Toggle
  Created a new InControlCategory class that includes a toggle for controlling the "Spawn Rule Stats Fix".

• Managing Tag-related Attributes
  Implementation of mixin functionality to manage attributes related to health, speed, and damage checks in UTRuleBaseMixin.java and UTSummonAidRuleMixin.java.

• New Attributes Enum
  A new Attributes enum for health, speed, and damage management has been introduced in the Attributes.java file.

• Updated Language Entry
  A new language entry for "In Control!" has been added to the language file, en_us.lang.

• Mixin Configuration
  A new mixin configuration "incontrol" has been introduced in mixins.mods.incontrol.json.