Restructure Gradle for Dev Efficiency

[krossgg]

What

• Reformat the Gradle Version Catalog to use the .toml format, as it is easier to update and add dependencies as needed.
  • Dependencies have been changed to specifically refer to 1.20.1 Forge, as that is the only version being targeted by this branch.
  • Lines in dependencies.gradle have been changed to reflect this
• Enable the use of machete, the jar compression tool, during CI actions, specifically when the 1.20.1/1.21 branches are pushed to or when a release is being published.
• Cleans up various parts of the build scripts
• Update Gradle to 8.11
• Update the following plugins:
  • ModDevGradle 2.0.52-beta -> 2.0.64-beta
    • While there are newer versions available, there is currently a publishing bug with the Legacy plugin past this version. See here
    • Some buildscript syntax has changed due to this update
    • This update makes all modX configurations completely non-transitive
  • Spotless: 6.25.0 -> 7.0.2
    • Spotless will now only check for changes with regards to origin/1.20.1, which should help speed up spotless operations
  • Lombok: Plugin from 8.7.1 -> 8.11 and version from 1.18.32 -> 1.18.36
  • Shadow (if ever needed): 7.1.2 -> 8.3.5
  • Jetbrains Annotations: 24.1.0 -> 26.0.1
• Update LDLib from 1.0.31 to 1.0.33.b, without issue
• Change dependencies to use FTB Maven for FTB mods
• Remove the rei-api artifact as a dependency, as it is both unnecessary and was the causing for spamming EnvType.Client during builds. See REI's repository for the recommendation.
• Restructure repositories.gradle so that we use preferred repositories for dependencies known to be there, reducing dependency resolution time
• Fix the mixin refmap not being included in the slim jar
• Disable removal javac linting as well as suppressing the mixin annotation processor's [Note] level console out
• Change the maven-java publish settings to actually add the sources jar as a tagged variant rather than simply attaching the artifact
• Enables Gradle's parallel configuration and build caching in gradle.properties for faster build times
  • Seems to not cause problems, can always be disabled if necessary

Outcome

Happy.

[Ghostipedia]

Looks fine, I'd like @screret or @TechLord22 to double check over this as well
👍