Fix panic on unrecognized controller buttons and axes

[potatotech]

Fixes #1128.
Fixes #1154.

Changes the panics to return None and implements the following button types:

SDL_CONTROLLER_BUTTON_MISC1
SDL_CONTROLLER_BUTTON_PADDLE1
SDL_CONTROLLER_BUTTON_PADDLE2
SDL_CONTROLLER_BUTTON_PADDLE3
SDL_CONTROLLER_BUTTON_PADDLE4
SDL_CONTROLLER_BUTTON_TOUCHPAD

[Cobrand]

#1154 (comment) As discussed here, can you also change the panic do return None instead? We don't want to panic for unrecognized buttons.

[potatotech]

Should I also remove the panic for unrecognized axes, or should that be in its own PR?

[potatotech]

I went ahead and changed the axes panic to return None. It is a one-line change, so might as well do it here.

[Cobrand]

Thanks!

[potatotech]

I neglected to update the changelog in the PR. Since this adds new enum variants, should this be considered a breaking change?