…apsulation on serialized values, added new hover reactors among many various minor changes.

Extracted responsibilities out of RTSSelection and moved them to various other classes or shorter methods (300 lines to 100)
- SelectionBox for UI Logic
- Moved Selection Logic out of Camera controller
- Moved Mesh Generation out of RTSSelection to MeshBuilder
- Moved various serialized values to centralized GameData storage via singleton scriptable object
- Cleaned up multiselect and select determination
- Fixed bug that would cause selection to flicker for items being reselected.
- Added extendable SelectionListener and strubbed in class for a SelectionRing.
- Added IInputProvider for multi-platform support (helpful when porting to VR)

… Added New; CameraPan and CameraZoom features, Stubbed in CameraEdgeScroll

…eaned folder structure

…ng data for object pooling, new URP Decal Shader for Hover Rings.

…s after panning, SelectionColor now uses unlit shader, added a F10 toggle for the help UI