[FEAT] ProBuilder :

- 14 unity_probuilder_* advanced-tier tools (probuilder-bridge.js + probuilder-tools.js), companion to unity-mcp-plugin 2.35.0
- create_shape, info, extrude_faces, bevel_edges, subdivide, delete_faces, translate_faces, flip_normals, set_face_material, boolean, combine, probuilderize, center_pivot, export_mesh
- Full parameter schemas; reachable via unity_advanced_tool under the probuilder category; names derive to probuilder/* routes so lazy-load works against unlisted plugin builds
- Follows the UMA optional-integration pattern; advanced-tier count 254 -> 268
- Tests: tier-count pins updated, probuilder tier/route-parity unit tests, end-to-end advanced-tool dispatch round-trip (50 pass)
- Bump package 2.32.0 -> 2.33.0