feat(world-law): add EVA and Titan law lab

[doodlewind]

Summary

• add renderer-independent hidden-state, relation, field, transition, and projection runtime via feat(pocket3d-world): add world law runtime pocketjs#310
• add deterministic EVA A.T. Field, Titan Paths regeneration, and cross-law chambers with state receipts
• replace procedural EVA/Titan stand-ins with attributed CC BY 4.0 GLBs; pose and split the Titan arm for physical severing and regeneration
• add reproducible Blender import, source/output hashes, attribution, QA previews, runtime asset budgets, and CI captures

Validation

• cargo fmt --package pocket-openworld -- --check
• cargo test --locked --package pocket-openworld (34 passed)
• cargo clippy --locked --package pocket-openworld --all-targets -- -D warnings
• eva-at-field 190 turns: acceptance true, visible 00c703a156f42df9, hidden 61916dc7000e79e5
• titan-paths 300 turns: acceptance true, visible 05290374e9391ada, hidden 3979bd8f1a328027
• world-law-crossover 190 turns: acceptance true, visible 6be53798f4950106, hidden 6ee66afb0a5f6fc5

Dependency

Draft until pocket-stack/pocketjs#310 lands and this branch can advance its gitlink to the merged revision.