Add smooth low-resolution turning

[ceski-1]

There have been a couple requests for this: https://www.doomworld.com/forum/post/2776801 https://www.doomworld.com/forum/post/2790719

When smooth_shorttics is enabled, the view angle appears to move smoothly when using shorttics. The catch is that the true angle is actually somewhere within +/-0.7 degrees of this value. It would be nice to get some feedback from players to see if this is too disorienting.

Example (the menu items are placeholders, but maybe they're nice to have):

https://github.com/fabiangreffrath/woof/assets/56656010/a797cb09-0d2b-4c23-9860-c557bbf8a697