Add a custom camera for arena/soccer

[Alayan-stk-2]

Currently, there are three main sets of camera parameters : standard, drone chase and custom.

I've received requests from multiple different people to have a second customizable camera that would be usable for soccer, and perhaps for battle mode too.

Switching which camera is used automatically depending on the active game mode would bypass the user picking which camera is active (what if a user wants to use the standard camera, the drone chase camera, or his racing custom camera in soccer?), so users would have to manually switch in the settings which custom camera is active when changing game mode... But that is also limited in practicability.

Another way would be to increase the number of settings inside a camera profile to have a soccer FoV, backward camera distance and backward camera angle (the distance and angle of the forward camera can probably be shared).

Yet another way would be to have two different camera selector, one for racing and one for soccer. The underlying options available for both spinners would be the same and the player would be allowed to pick the same camera for both or different ones, and the switch based on game mode would happen smoothly.