Added MPL license headers
SectorRenderer renders entities in sector, manages particle systems for ship thrusters
Thrusters apply torque based on orientation and position relative to ship center of mass
GameManager controls the player ship's thrusters
Player can dock with station if they are near
Entities now have dedicated docking bays with their own cargo area for loading/unloading
Inventory panel allows display of any ship or cargo bay at the currently docked station or within the current ship if undocked
Created menu screen
Created inventory tab with 2 cargo panes and properties panel
Updated the style of every UI prefab
Implemented Blurred UI material
Implemented UI shaders for map layers
Created Map tab (still needs input)
Improved inventory grid layout system by creating a single spritesheet with all 256 possible combinations of cell adjacency, and modified the inventory script to index individual sprites using adjacency
