Reonucam and camera collision defines

[Reonu]

This PR adds Reonucam as a define, and additionally, adds a camera collision define for 8 direction camera that also affects Reonucam by extension (but you can toggle either separately)

Will update this in a sec listing all the features of reonucam

REONUCAM FEATURES

• Pressing the cbuttons will rotate the camera by 45º as usual
• Pressing R+Cbuttons will rotate it smoothly
  • If you rotate it smoothly, and then rotate it 45º again, it will re-align itself to 45º automatically
  • You can change the speed of the smooth rotation in the pause menu
• Tap R once to center the camera behind Mario
• Tap R twice to enter Mario cam (as in vanilla mario cam)
• Compatible with camera collision
• When in water or flying, you can press R at any time to swap between the vanilla swimming/flying cam, or Reonucam (default is vanilla)
• You can press R+Cup in order to look down cliffs. The camera will continue being angled down until you let go of both R and C-up. So you can press R+C-up, then let go of C-up but keep holding R, and you'll have a top-down view until you let go of R.
• Doesn't use a single button more than the vanilla camera. Perfect for hacks with lots of custom mechanics that might want L and the dpad to be free.

[Reonu]

Will review this properly tomorrow:tm:, but for now please remove reonucam from the enhancements folder

it's already not there in 3.0