Removed WebVR support

FileLoader.d.ts type fix

Examples: Fix webgl_materials_envmaps_parallax.

FBXLoader: use new BufferAttribute.applyMatrix4() method

NodeMaterial: missing attributes in type definition

 Default Normal Shader: transform tangents with modelViewMatrix

WebGLRenderer: Remove gammaInput.

Docs: Update HTML Snippet colors for dark mode

Editor: Add PLYExporter.

BufferGeometryUtils: Make computeTangents() more robust

Update docs to reflect aoMap/lightMap matrix support.

continuation of #18098

We now transform UV2 using the matrix from aoMap/lightMap so docs don't
need to state that we don't support that anymore.

GLTFLoader: Cache default material in the same way as we do for other materials

Clean up lgtm alerts.

Implement support for texture matrix for uv2

Before this change, we only supported one texture matrix for the
material that was applied to uv data based on the first texture, in
priority order, that needed it.

This change adds equivalent support for uv2 - we now transform second UV
channel with a second UV transform that is grabbed from aoMap or
lightMap (that are the only two textures using it atm).

This fixes glTF rendering for files that use KHR_texture_transform on
the occlusion texture, including ones produced by gltfpack.

Examples: remove TerrainShader