simplify controllers (HarbourMasters#4914)

* start moving towards just using `ShipDeviceIndex::SDLGamepad`

* rename `ShipDeviceIndex` to `ShipDeviceType`

* all sdl mappings are always `ShipDeviceType::SDLGamepad`

* create new `physicaldevice` directory where the new stuff can live

* `ConnectedPhysicalDeviceManager`

* start to not need index mapping manager

* somes fixes and stuff

* remove more shipdeviceindex stuff

* more removing and what not

* axis thresholds

* rename some stuff and remove device icons

* back to all stuff visible

* show connected device names

* bring in mouse color from lus input editor window

* lus

* remove

* more stuff

* more lus

* basic filtering

* update lus

* upstream LUS

* make `Controller_ShouldRumble` make sense