Added Opfor-FIA and INDP-FIA ORBATS

Naming standard: GrpOFIA, UnitOFIA, GrpIFIA, UnitIFIA. BLUFOR FIA remains GrpFIA, UnitFIA.

GroupID, Markers, assignGear and briefing have been adjusted. 
OFIA and IFIA use default FIA gear and briefing.

TODO: Make new units playable.