Avoid passing this anywhere in the client code. It should only be set right before rendering the 3D view and the only code using the base palette should be the 3D renderer and hud_drawsprite.
Also make the palette override CVARs 3D view only in debug mode.
* Calculate game-side mousex/mousey divisions into the calculations performed in `InputState::GetMouseDelta()`.
* Fix mouse speed when `in_mousesmoothing` is true (wasn't factoring in / 3.f division used in non-true vector.
* Standard mouse forward/side movement speeds in Exhumed & SW with that of other games.
* Remove `strafeyaw` code from Duke/Exhumed/RR as it's not necessary and was leading to situations where the player would continually keep moving sideways even without input.
* Change mouse forward/side velocities to -= current value as is done with controller input and the player's angle/aim velocities.
From the looks of it the engine calls the sound function repeatedly while the sound plays to perform distance checks.
With the OpenAL backend these checks are totally unnecessary and shouldn't do anything.
* Convert axes in ControlInfo struct from int32_t to float as what's received from the backend.
* Remove all the scale up/down math since we don't need that with floats and replace with float constants that match old behaviour.
* Store q16mlook scaling as a constant for use with mouse and upcoming controller code.
* Add required controller code to Blood as the only game not to have working controllers.
* Fix typos in (gInput.forward > input.forward) for `ctrlGetInput()` in Blood.
* Remove use of `scaleAdjustmentToInterval()` on Exhumed and Shadow Warrior as they only process forward/side velocities within the game's ticrate.
* Repair angvel/aimvel scaling mistakes from d79a5d256d.
* Scale dyaw and dpitch by 25% for Shadow Warrior as the game runs 25% faster than the other games, leading to faster input.
This is to allow giving them a texture ID so that they can be used from ZScript which has no access to naked textures.
This also consolidates AnimTexture and VpxTexture.
* Repairs https://forum.zdoom.org/viewtopic.php?f=340&t=67239 and https://forum.zdoom.org/viewtopic.php?f=340&t=67933
* Values that come from GZDoom backend are too low to be suitable for the Build games which were dividing by 'analogExtent'.
* Remove definition of analogExtent from all games and define in inputstate.h, then define joyaxesScale as 75% of analogExtent to provide a bit of headroom and not have a scale of 1.0 be full speed.
* Invert the returned results of GetAxes() as the returned floats are reversed for build games.
* Leverage scaleAdjustmentToInverval() on game-side code to consistently scale the input irrespective of frame rate, vsync etc.
