Render some squadrons

[danbuis]

Render all the squadrons to our test bed screen

• [x] Add some basic solid color rendering functions
• [x] Figure out how to put all the things together into one "container" / data structure
• [x] Test out the basic rendering
• [x] Make a Squadron for each one available and render to the DemoMap (this will test out moving a squad, might as well do some rotation too)
• [x] Correct any file names that need it
• [x] Unit tests for movement the parent Squadron object
• [x] Move items to GameConstants file or whatever it is called - [ ] Refactor Opened a skillion issue cards for refactoring/tech debt
• [x] Re check tests
• [x] Render squadrons and map (this is currently not working as intended at the time of writing)
• [x] Documentation on changed files