Add setting to limit the terrain vanilla actually renders

[sisby-folk]

Currently there's a setting to disable vanilla rendering altogether, which provides an FPS boost to the client. It would be useful to have a setting that limits the distance for which vanilla terrain specifically renders, below the overall vanilla render distance.

FP2 exact terrain would need to render these chunks as a result for this to remain useful.

This would allow for chunks within vanilla's "Render Distance" radius but outside of FP2's "Vanilla Terrain Render Distance" radius to:

• Render Terrain using FP2 Exact terrain (fast)
• Tick
• Render Entities (Such as mobs) using vanilla rendering

Along with #8 this could make for a much closer facsimile of vanilla rendering on the cheap (as it is expected that FP2 exact will run substantially faster than even something like sodium terrain)

[Gaming32]

This would be easiest, if not already done, when this mod is ported to Minecraft 1.18+, due to Minecraft 1.18+'s "Simulation Distance".