Minor Cleanup of IDE warnings, also small bugfixes

[WaitingIdly]

changes in this PR:

• engage in a significant amount of "IDE warning gets autofixed" action
  • weaken overly strong variables
  • less modification of method parameters
  • one line per variable/field declaration
  • remove redundant field creation (eg null or 0, when that is already the default)
  • apply @Override annotations where they ought to be
  • make name use super.name in recipe builders where it can be confused for the name in the parent class
  • remove unused imports
  • use pattern variable
  • use improved switch format
  • make finalizable fields final
  • a few more minor things
• make Blood Magic return the recipe in register correctly
• store only the recipe in most roots stuff, instead of Pair<ResourceLocation, Recipe> (Recipe has the RL, its pointless)
• fix some extended crafting shapeless recipes actually being shaped recipes
• remove some instances of @MethodDescription(description = "x") where x could be assumed
• add the ability for java arguments to control documentation, and add settings to gradle.properties to allow that
• reorder the gradle.properties debug stuff and comment it
• fix mode being renamed to compactorMode not having documentation or examples updated

removes ~480 warnings, which according to my IDE, means only 460 left in the groovyscript folder.

[brachy84]

Not a huge fan of removing initalisation of fields even if its their default value. It helps make the code more readable and less ambiguous. Also the 1f -> 1.0f seems unecessary, but its fine.