new:
- added new attribute "placeable_on_water" for blocks: this allows to make some blocks placeable directly on water surface.
- added new attribute "placeable_on_lava" for blocks: this allows to make some blocks placeable directly on lava surface.
- added new attribute "shift_up" for blocks: this allows to make some blocks placed one block up. This is useful for REAL_WIRE blocks to create tall plants.

fixes:
- fixed furniture_sit hitbox related problems
- fixed placement problems of REAL blocks which use a block as item material https://github.com/PluginBugs/Issues-ItemsAdder/issues/1112
- fixed Purpur compatibility with resourcepack exploit protection https://github.com/pl3xgaming/Purpur/issues/593