t_p5_validator: add 5 Godot 4 map validator scripts
- validate_map.gd — scene structure validator (CSG combiner root, spawn groups,
bomb sites, buy zones, map bounds, LightmapGI config, lighting setup)
- validate_polycount.gd — CSG triangle budget checker
(<50K faces, <5K per node, <200 CSG nodes)
- validate_textures.gd — texture size ≤1K, mipmaps, UV2 checker
- validate_lights.gd — dynamic lights ≤4, bake mode validator
- bake_lightmaps.gd — LightmapGI config checker
(quality, bounces, texel_scale, interior, denoiser)
All scripts: @tool SceneTree, accept scene path via -- separator,
exit 0=pass / 1=fail / 2=scene-not-found. 443-610 lines each.
shawn
ffa72a8f24