Basis Universal LDR/HDR WebGL demos

Example web pages using the transcoder (compiled to WASM) to render .KTX2/.basis textures in WebGL, and the encoder to encode .KTX2 files.

• 3D model (glTF 2.0)
• .ktx2 texture transcoding/encoding test
• .basis texture transcoding test
• .basis ETC1S texture video test