3.18 Movement update + Fixes

Hello everyone. After recovering from some of the previous Demo3 burnout, I have been chiseling away again, attempting to create the impossible monument of perfection. Orb game.

- Added slight air control and wall climbing. This was tested heavily and tuned to not be too powerful, while also giving newer players an easier time overall.

- Fixed scan particles not appearing. This was an absolute pain to fix and involved issues that would only appear once the game is compiled/built, but not in the editor. I am glad this is out the way. For the fellow developers out there, MeshRenderer shape particle systems do not like being on meshes that don't have Read/Write enabled for some reason. Turn that on, but try not to do it on every mesh since it does use increased memory.

- Fixed certain sounds not being mixed into the sound effects group. This would cause some sounds to become much louder, deafeningly so at times.

- Fixed the "Gateway Top" level not appearing when unlocked. 

- Updated certain level node fonts to be lore accurate.

- Changed the start tutorial to force you to learn scanning before you are sent into the real world.

- Fixed checkpoints having no audio.

- Fixed weapon/ability icons not showing up, again.

- Other small level changes and optimizations.