Add prefab for all buildings

[jellewie]

Make a (placeholder) prefab for all buildings

Example of buildings (please check the wiki for updates)

• [x] Bridge for moat
• [x] Moat
• [ ] Mangonel_Tower
• [ ] Balista_Tower
• [ ] Town_Square
• [x] Fire_basket
• [ ] Trap_Pit
• [x] Keep
• [ ] Military .
• [ ] Barracks
• [ ] Swords_Maker
• [ ] Bow_Maker
• [ ] Spear_Maker
• [ ] Leather_Jacket_Maker
• [ ] Blacksmith_Armor
• [ ] Blacksmith_Tools .
• [x] Wooden_Wall
• [x] Wooden_Wall_Spiked
• [x] Wooden_Gate
• [ ] Wooden_Tower
• [x] Wooden_Stair
• [x] Stone_Wall
• [x] Stone_Wall_Spiked
• [x] Stone_Gate
• [x] Stone_Tower
• [x] Stone_Stair .
• [x] Stockpile
• [x] Lumberjack_Hut
• [ ] Stone_Quarry
• [x] Iron_Mine
• [x] Ox_Transport
• [ ] Repair_Building .
• [x] Granary
• [ ] Apple_Farm
• [ ] Cow_Farm
• [ ] Hunter
• [ ] Wheat_Farm
• [ ] Mill
• [ ] Baker
• [ ] Fischer
• [ ] MISC .
• [ ] Home
• [ ] Trading_House
• [ ] Church
• [ ] Water_Well
• [ ] Alchemist