Also attempted to fix material changing and updating the rendered block

- Added support for seat enter and exit events and a test for them
- Added support for entering and exiting seat from code
- Changed the Id property of ECS objects to non-abstract, requiring it in the constructor, so that the Player class can inherit EcsObjectBase
- Added a weird constructor to EcsObjectBase that allows running code to determine the object Id
- Added interface for engines that receive entity functions
- Exposed the entity submission scheduler and removed it from FullGameFields because it moved from there
- Made the Game.Enter event only fire after the first entity submission so the game is fully initialized and the local player exists
- Added all seat groups to the dictionary

Removed old dependencies, including uREPL
Added new block IDs
Implemented basic command handling to support existing mod commands

Added check for time mode toggle to avoid crashing the game
Added support for having the ref folder outside the solution in gen_csproj.py
Removed BlockIdentifiers class
Added check for invalid player ID when placing blocks
Resolved compilation errors

Remvoed Hotbar and GameClient since their functions are also implemented in OOP classes
Added static methods to add/remove persistent debug info
Made some patches and other things internal
Added support for FlyCams in SetLocation

Using QueryEntityOptional directly with the player properties
Character structs are camera structs in build mode
The FlyCam rotation is not updated in build mode, only the camera is

Fixed prefab update for nonexistent blocks
Removed Type from block placed/removed event args
Added test to check the block ID enum (whether it has any extra or missing IDs)
Added test to place every block on the ID enum
Added test to set and verify each property of each block type (type-specific properties are also set when they can be through the API)
Added support for enumerator test methods with exception handling

Though the major benefit is only for blocks right now (using initializers)

Except those that actually refer to the game's code