Photonics: A raytracing engine

Changes:

• Added 2 additional spatial reuse passes for disocclusion. This is another big improvement to ReSTIRs noise while in motion.
• Improved clarity of simple lighting in motion
• Added new option ReSTIR Combined Gi, which passes Gi through ReSTIRs denoiser, improving clairity at the cost of performance and noise.

Bug Fixes:

• Fix black stripes on Gi with low resolution
• Fix more Photon issues with LOD chunks
• Fix ReSTIR breaking when handheld lighting is disabled
• Fix ReSTIR denoiser artifacts when using low render resolution

Supported shaders

• Photon (requires latest version from Github)
• BSL v10.1 (exact version)

Release made by @Essentuan