* 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.
* 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.
* 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.
- Inline function returns a double, therefore we should use it and not potentially truncate the mantissa.
- Use divisors to get true numbers of some floats (3.333 -> 10/3, etc).
- Remove a few brackets/parentheses where possible from what are already exceedingly bracketed lines.
- Input velocity now consistent irrespective of frame rate.
- Angle and horizon calculated at frame rate.
- Replace usage of F16() macro with fix16_from_int() in GetInterruptKeys().
Note: Known issues with look up/down keys that is to be repaired.
The data organization here is a mess, no wonder that this game could only save at the beginning of a level.
Fortunately it's all static so no allocations and pointers to track.
The regular sounds are not a big deal, but this game contains two special effects that were problematic to port. We'll have to wait and see if they work as intended - the original panning effect is not 3D compatible so I had to redo it.
