Add fake high-resolution turning setting

[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):

smooth_shorttics.mp4

[rfomin]

Crashes when run without `-warp' command.

I like the idea.

[Big-the-Fat]

I've been trying it out and haven't felt any issues. Sorry I can't give specific details. I think for changes like this 'feel' is important and I can't say that the feel is negatively impacted. Oh, I play with a wired DS4 through DS4Windows so that might have some impact. I dunno about any of this stuff, though. I just thought I'd chip in since there hasn't been much response from others. :)

[ceski-1]

@Big-the-Fat Thanks for the feedback! It works the same way for mouse or gamepad. I can tell the difference between "smooth" shorttics and actual longtics, but if most people can't then it'll be fine for casual play. Speedrunners more than likely would prefer "coarse" shorttics for executing tricks consistently and won't use this setting.

[ceski-1]

Test wad to demonstrate a worst case scenario: shoot_the_button.zip

[rfomin]

Looks good for me, thank you.