What is new_bot? 

You can have all your questions answered by looking at the Author's page (Martee) here... https://dayofdefeat.home.blog/new_bot/

Its a metamod plugin (like RCBot2 for dod:s) with it's roots in the source code from Botman's HBP_bot.
The kicker here is it can look at Sturmbot's waypoint folder, grab those and use them.

There is a lot more, I urge you to visit Martee's pages and try it out.
At the moment it will work (very well from my testing) on Windows.

Linux support is not there yet.

You should also consider installing AMX Mod X on your listen server, it really changes your experience in dod.

So... whats it doing here on Sturmbot.org?

This website was made for Sturmbot...way back in 2013. But it is more about day of defeat in general.

Marine bot is here too, player guides, server guides, hud and gui.Sturmbot.org evolved into a "dod fan site" more now.

Each bot has pro's and cons, now dod has 2 authors activity improving bot support for dod... I welcome that and use them all.

More to come I guess.