Resolved compiler errors
Mostly by removing erroring code

- Updated project to use .NET Standard 2.1, which is what the game uses
- Updated CodeGenerator to use .NET 6

Save game details were changed, they may not work properly
Game mode change event no longer sends game data, needs fixing

Fixed block name print regex
Made Game.WorkshopId obsolete as it's removed from the game
Fixed removing blocks

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

Except those that actually refer to the game's code

Now it prints them ordered and mostly suitable to be used in code (it only needs a couple replaces)

Newly created blocks use the initializer to set properties, allowing the user to set per-block properties

Newly created blocks use the initializer to set properties, allowing the user to set per-block properties

Made GetBlockInfo() always return a reference without needing it as a parameter
Fixed Color property
Added CustomColor property for temporarily setting any color

Added API for adding more information on the debug display (not object-oriented yet)
Removed the setter for block type to ensure stability
Made the block API return defaults if the block no longer exists
Added property to check if the block exists
Made a struct for the block's color property
Added missing block IDs

Fixed compile issues and added new blocks