add speedydex mod

[KorGgenT]

Summary

SUMMARY: Mods "Add speedydex mod"

Purpose of change

The speedydex mod was one of the mods that was lua only. A couple of people were asking about it, so I took a look at it. turns out it was pretty simple!

Describe the solution

Adds two external options. One controls the minimum dex required to increase your moves, the second one is how many moves increased per point of dexterity. As such, it increases linearly. Then, i added an override to get_speed() in Character that adds that bonus to moves (always 0 if vanilla).
A side affect of this approach is that NPCs will have a higher speed if their dexterity is higher.

[Lorith]

And the side effect is actually a bonus that I had wanted with the LUA version but couldn't figure out, win/win with that. Thanks a lot for looking into this.

[dissociativity]

if inversely, dex below 8 reduces move speed this might actually balance strength minmaxed characters a bit and a slightly nerfed version might fit into mainline?

[Lorith]

That is actually an interesting idea, I think it might fit even better like that. Configure a 'neutral' dex than both above and below that value influence speed instead of just above.

[Mecares]

I really like the idea it would at least make str vs dex a more interesting choice. Still would leave per and int on the weak side of stats but an improvement of the current situation nonetheless.

[kevingranade]

This pull request has been mentioned on Cataclysm: Dark Days Ahead. There might be relevant details there:

https://discourse.cataclysmdda.org/t/speedy-dex-lua-mod/15344/1