Add option to control mob cap implementation

[Alexandra-Myers]

Description

This is more or less an expansion of #789, preserving LCE functionality by default whilst letting the user remove the mob cap.
This PR introduces per-chunk caps based on Java Edition 1.8.8, as well as 4J's comments on what they changed from Java.

Changes

Previous Behavior

Previously, the limits for certain mob groups in their count was unchangeable, and the limits were enforced level wide rather than per chunk.

Root Cause

This was not erroneous but was rather a design decision to allow for better performance on the devices it ran on.

New Behavior

By default, it uses the same logic as existed before this version, however there is now an option to turn off mob caps, when true it is as follows:
Does NOT remove the mob cap for spawning, rather, breeding, spawn eggs, and construction are all unlimited, and spawning works exactly like in Java, with the base size per chunk for the mob category (leftover in original LCE code, though I edited it to keep the max count the same when one player is on) being scaled by the amount of loaded chunks and then scaled back down by a magic number (it is literally called MAGIC_NUMBER in official mappings for the modern game), which is then used as the mob cap for that category, effectively acting as the mob caps used in LCE, except more dynamic.

Fix Implementation

Stores eGameHostOption_WorldMobCap onto game host options using the bitmask 0x40000000.
Added no-mob-cap to server.properties to control it on the dedicated server.
Added a checkbox to UIScene_LaunchMoreOptionsMenu for modifying the mob cap setting.
Inside of Level::canCreateMore, added a check for if eGameHostOption_NoMobCap is enabled, returning true early if so.
Removed MobCategory::getMaxInstancesPerLevel, its usage has been replaced with MobCategory::getMaxInstancesPerChunk.
m_max in MobCategory was turned into a pointer as a reference for the now non-constant caps. (later can become user controlled with a better config system, ideally)
Removed the m_maxPerLevel field from MobCategory, instead using m_max.
Inside of MobSpawner::tick, references to mobCategory->getMaxInstancesPerLevel() were moved to their own variable and replaced with mobCategory->getMaxInstancesPerChunk(), as now if eGameHostOption_NoMobCap is enabled, the max instances will be updated to instead use Java's math, as so:

maxInstances = mobCategory->getMaxInstancesPerChunk() * chunksToPoll.size() / MAGIC_NUMBER; // Java is mobCategory.getMaxInstancesPerChunk() * this.spawnableChunkCount / NaturalSpawner.MAGIC_NUMBER

AI Use Disclosure

No AI was used in the making of this Pull Request.

Related Issues

• Related to 50% - 100% increase to some mob caps. #789

[Alexandra-Myers]

does anyone have any suggested software for dealing with swf files?

[Alexandra-Myers]

These images show the unlimited mob cap removing the limit on spawn eggs (this is running on a dedicated server)

[Alexandra-Myers]

I have tested a little bit more, spawning seems to be working fine

[Alexandra-Myers]

does anyone have any suggested software for dealing with swf files?

I know what they are, however I don't know how to use them.

[Alexandra-Myers]

Okay, PR ready.

[Alexandra-Myers]

@codeHusky I believe now it should be ready to merge.

[Alexandra-Myers]

If you'd like, I can revert the changes I made to the constants (making them no longer const), as at this point they are mostly unnecessary (though I kept them for future expansion).