allow placing unsupported pumpkins

[WaitingIdly]

adds the ability to place pumpkins without needing a supporting block below
marks a mod which adds this ability this as obsolete
brought up here #97

[what-the-diff]

PR Summary

• Enhancement in Pumpkin and Jack'O'Lantern Placement
  This update allows users to place Pumpkins and Jack'O'Lanterns without the need for a supporting block beneath them. It grants more creative freedom and flexibility in building designs.

• Introduction of a New Class for Unsupported Pumpkin Placement
  A fresh class (UTUnsupportedPumpkinPlacing) was formed to adjust the rule if a Pumpkin or Jack'O'Lantern can be placed on a certain position, enhancing the gameplay mechanic.

• Added New Configuration File
  A new JSON file (mixins.tweaks.blocks.pumpkinplacing.json) was included to handle the changed gameplay mechanic and guarantee overall game balance.

• Integration of New Mechanic into the Game Loading Process
  The game's loading process (UTLoadingPlugin class) was amended to incorporate the new mixin file, ensuring smooth operation and integration of the new feature.

• New Settings Option
  A new option (utUnsupportedPumpkinPlacing) was added to the game's configuration (UTConfigTweaks class) allowing players to toggle on or off the unsupported pumpkin placing feature per their preference.

• Compatibility Check with Existing Mods
  Updates were made to the UTObsoleteModsHandler class to ascertain if the new unsupported pumpkin placing feature is compatible with an existing mod (ppa). This is crucial to avoid conflicts between various mods which can disrupt gameplay.