TAA-Distant Horizons port

Fork of /shaders/taa to add distant horizons support. Only tested 1.20.1 briefly, here be dragons! Has vanilla looking ssao, personally it looks better than DH's default.

approximately a 15% performance hit.

Features:

• Works with Iris and Colorwheel(enable fallbackmode in colorwheel)
• TAA: Core feature, smooths edges
• Sharpening:
  • Unsharp Mask: Leaves trails behind fast moving objects.
  • CAS (Contrast Adaptive Sharpening): More stable, but still has some downsides to it.
• Fog Start Distance:
  • Configurable fog start for distant horizons, as a ratio of the render distance.
• Vanilla-like Ambient Occlusion:
  • Configurable Ambient Occlusion samples, higher looks better but runs slower.
  • Configurable Radius and Intensity: Preference based, default values should look the same as vanila(or at least close enough).