refactor: goodbye KeyBindEvents, hello InputAction

[Bronya-Rand]

This PR does the following. There's a lot so gonna word this in steps.

1. Resolves Issue [Request] Ability to change freecam movement keybinds #156 on setting Free Camera keybinds.
2. Removes KeyBindEvents

   This key system just doesn't handle hold press actions which is needed for some sections of code.

3. Removes InputConfiguration and InputService.

   These relied on the old event code so I rewrote them from the ground up.

4. New InputManagerService and InputManagerConfiguration.

   This should now handle keys similar to KeyboardFrame without the jank.

5. New KeyConfig.

   Basically holds the key data in Brio back to Dalamud and the rest of Brio itself.

6. Recoded every file using old KeyBindEvent logic for KeyConfig and such.

This is a very lengthy PR and right now XIV controls can interfere with some button selections, but it should be all good to go here (hopefully).