Enhance camera transitions

[lebull]

This PR implements transition durations as well as offers a selection of different transition curves. For this PR, I tried to not touch existing code as much as possible.

TODO:

• [ ] Reimplement transition type and set that as default to preserve previous behaviors

  • Right now, I am only able to approximate it, and I'm having trouble reading the original code.

• [x] Add Transition Types to the settings file

• [x] Doublecheck that I didn't do anything stupid

Issues:

• Not an actual bug, but the existing behavior of exiting an orbit is sometimes VERY jarring when using .
• I feel like in my video, my movements affected the camera's current position a lot, and I think it just needs to be the lookat if I'm not mistaken. Needs to ask about this/look.

[friesofdoom]

* I feel like in my video, my movements affected the camera's current position a lot, and I think it just needs to be the lookat if I'm not mistaken.  Needs to ask about this/look.

Yes, this is when the look-at is a bone on the player. The code applies (or used to) exponential smoothing to this position. The lookat position smoothing needs to be cranked up a bit.

[friesofdoom]

Overall I like the refactoring, the orbital transition still scares me though 😓

[sepffuzzball]

Looks good to me!