Fix TechTree and Add defence to TS Test AI

- AI Builds now Defence Buildings
- Add "Prerequisites: radar" to all defence Buildings (like in Vanilla TS)

- Definition "AntiAir:" added as BuildingCommonName (with SAM Buildings)
- Definition "Radar:" added as BuildingCommonName (with Radar Buildings)
RADAR:
	Tooltip:
		Name: Radar
		Description: Radar

but a definition which works :/