Post-Processing Update

1. Happy Spring Festival!
2. Added a "Depth Confidence" option for TAA. It relaxes the acceptance rate of history frame colors based on depth information to reduce flickering and jittering, thereby improving image stability. However, this will cause noticeable ghosting and blurring. It can be turned off in the shader settings.
3. Rewrote Depth of Field (DoF) to support a wider range of blur.
4. Adjusted the usage of reflection data to reduce tearing and grid artifacts in specular reflections.
5. Adjusted translucency effects in the Nether and the End.
6. Added comments to some shader settings and synced them to the English language file.
7. Minor refactoring, fixed some bugs, and other adjustments and optimizations.