Refactor to work within Scene System

[kEllieGit]

This PR does a multitude of things:

• Refactors the ScriptPlayer and old systems to work with the Scene system, aside from the old Entity system.
• Removes all old networking code from the entity system. Will make the system incompatible with multiplayer games, but that will be a task for later.
• Updates the UI systems to work under a singular MainHud PanelComponent, which creates and manages the other base hud elements.
• Add a bunch of small QOL changes.