DarkGru AI

Adds custom and overriden AI characters and groups for the DarkGru Servers.



**NATO**
- USMC
- DarkGru Operators (SF)

**CSAT**
- PLA

**VEPR**
- 6 Riflemen
- 1 Machine Gunner

**CIV**
- Admin Referee
- 5 Custom Civilians

Expect to see more in the upcoming future