test: add data sanity checks; fix recipes referencing missing item ids (1.8-1.12)

[AnonymoDGH]

Fixes #461

Adds an audit_sanity.js test with two checks:

• All PC recipe keys and recipe result ids must exist in items.json
• block.defaultState must be between minStateId and maxStateId

The new test uncovered real data bugs, fixed here:

• recipe key 75 (redstone_torch) existed under the wrong id in 1.8-1.12 → moved to key 76 with result id 76
• recipe key 426 (end_crystal) existed in 1.8 where end_crystal doesn't exist → removed
• recipe key 452 (iron_nugget) existed in 1.11 where iron_nugget doesn't exist → removed

Verified: 254 tests pass with the new checks; all recipe keys/results now reference existing item ids.