Added canPlaceMultipart to handle FMP/IMB multipart placement.

Requires ForgeMultipart 240+, Immibis MicroBlocks 57.5.1+

ForgeMultipart and ImmibisMicroBlocks are now working together to provide full protection for
multipart placement.

Before a player places a multipart, FMP/IMB will call
World.canPlaceMultipart to see if it is allowed to place. MCPC will fire
a BlockPlaceEvent to plugins to check permissions and return the result to
FMP/IMB to process. If false, FMP/IMB will prevent placement. If true,
FMP/IMB will place the part.

Thanks to ChickenBones/Immibis for adding support to make this happen.