v2.1.0

Release highlights:

• Major refactor of C++ API that separates the ReSTIR DI, ReGIR, and ReSTIR GI algorithms into distinct contexts.
• Shader functions and structs renamed to reflect partition of algorithms.
• Added ImportanceSamplingContext class that collects all 3 algorithms into a central class to ensure shared state is properly managed.
• UI redone for the rtxdi-sample project's ReSTIR DI, ReGIR, and ReSTIR GI sections.

Change Log