Implement shared motion interaction layer across input modes.

[tracygardner]

Implement shared motion interaction layer across input modes.

• Refactor and improve existing input handing forward/backward/sideways. New input manager architecture used throughout.
• Review memory release (babylon js and webgl) and performance
• Review and refactor api for movement forward, sideways and strafe
• Consider virtual joystick alternative to buttons for movement. Investigated and added based on input manager.

[tracygardner]

Initial refactoring to create an input manager here: https://github.com/search?q=repo%3Aflipcomputing%2Fflock+362&type=commits where I got the issue number wrong!

Key commits: 180045d d4e96de

Previously code for handling inputs across different devices was spread throughout the codebase and not consistent for different inputs. This refactor introduces a shared layer for motion and actions interactions across touch/mouse/keyboard/VR etc.

[tracygardner]

Initial improvements to simplify movement behaviour 3eb7b38

[tracygardner]

Improve memory behaviour of shape casting during movement. Tracked down objects that were not getting fully cleaned up and introduced a caching approach to reduce garbage collection churn. (This runs every frame with projects that use movement so the is crucial for lower powered devices.)

4f4b32

[tracygardner]

Apply dynamic physics automatically when using movement so users don't have to do an extra step. 7542edc