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)
This is fine. You don't need to change anything here. @Phrohdoh did not check the rules properly.