Bring bots back

[ensiform]

Needs to upgrade the bot interface and implement any unfinished features for their gameplay.

Will need to figure out a way to pull in the bot repo or link it somehow. Submodule presumably or only include what's needed manually.

As far as I remember, the code on this repo is presumably updated to be somewhat compatible with the newer omnibot code however the bot library probably needs extensive work especially in the teamfortresslib which was never completed and fully tested for ETF.

Perhaps see if @jswigart would still be interested in helping out.

Need people to create and update bot map scripts.

[ensiform]

https://github.com/jswigart/omni-bot

[jswigart]

I might be able to swing some time to work on it, but the last stuff I was doing is a whole new navigation system. I don't quite remember where I left off with it, but I think I was moving forward with a manual navmesh. Could probably backpedal to the waypoint stuff if the navmesh isn't up to snuff.

[ensiform]

@jswigart If that stuff is working condition I don't mind keeping it. Would be better than waypoints anyway. I believe the engine repo attached to this organization already has the hooks necessary in the renderer, just need to test it still works too.

https://github.com/etfdevs/ETe/blob/master/src/renderer/tr_cmds.c#763

https://github.com/etfdevs/ETe/blob/master/src/win32/win_main.c#1058