[codex] Add BitmapLayer lighting support

[charlieforward9]

Summary

• add BitmapLayer material prop support and register the Phong lighting shader module
• pass camera/common-space position into the fragment shader and shade the sampled bitmap color with lighting_getLightColor
• update BitmapLayer render goldens and add a shader-module regression assertion

Root Cause

BitmapLayer sampled and tinted texture color directly in its fragment shader, but it did not expose a material prop, include a lighting material shader module, or provide a normal/position path into lighting_getLightColor. Lighting effects such as _SunLight therefore had no shader path that could affect bitmap draws.

Validation

• yarn vitest run --project headless test/modules/layers/bitmap-layer.spec.ts
• yarn vitest run --project render test/render/test-cases/core-layers.spec.ts -t "bitmap-layer"
• yarn lint (passes with existing repository warnings)

[charlieforward9]

Closing in favor of upstream-backed PR #10352 to avoid cross-repository branch issues.

[coveralls]

coverage: 83.386% (-0.004%) from 83.39% — NEW-HEAT:codex/bitmap-layer-lighting into visgl:master