[NaySurGithub]

Adds the beta Block.isSolid property of the Script API.

The value comes from block_solid.json of BedrockData (protocol 2225), read from the 1.26.63 server by the DataGen solid lab: 1480 blocks, 633 solid, no per-state difference. It is embedded like the block tags and kept in its own table, BlockSolidity.

BlockData::mSolid is left alone: it means "obstructs movement" for about 27 callers (liquids, redstone, pistons, AI, world generation) and differs from the game's flag for 437 blocks (slabs, stairs, stained glass, doors, fences, leaves, chests, ice...).

Not verified:

• not compiled or run locally
• a block missing from the table (a custom block of a pack) reads as not solid; what the game answers for those was not checked
• the table keeps one value per type and only logs a warning if a later dump carries per-state overrides