Mob Health Indicators

Added a keybind to toggle rendering

Changed the rendering system to 2D (it not longer rotates vertically) to fix z fighting and other visual bugs

Added in-game commands for all the settings /MobHealthIndicators. Typing the following commands without the suffix will show their value, while typing just /MobHealthIndicators will list all values.

• showHearts [true/false]
• dynamicBrightness [true/false]
• filteringMechanism [blackList/whiteList/none]
• blackList add/remove [entity type]
• whiteList add/remove [entity type]