[Feature] GPU Performance Monitoring (Timer Queries)

[jsulpis]

Implement support for the EXT_disjoint_timer_query_webgl2 extension to provide accurate GPU profiling within the library.

Key Requirements:

• Create a mechanism to wrap a render call with gl.beginQuery and gl.endQuery.
• Handle the asynchronous nature of WebGL2 queries (waiting for gl.QUERY_RESULT_AVAILABLE).
• Provide an API to retrieve the execution time of a specific RenderPass in milliseconds.
• Include a fallback or warning for environments where the extension is not available.

Use Case:
Profiling heavy fragment shaders and identifying bottlenecks in the rendering pipeline without the overhead and inaccuracy of CPU-side timing.