Implement G1 savegame creation - Items + Hero position

[JaXt0r]

I recommend picking this up after: #28

Our game only supports New Game at the moment. We want to support official G1 savegames. As ZenKit supports save&reload, let's leverage it to have G1 compatible save games for Gothic-UnZENity.

Links:

• SaveGame.cs at ZenKit

TODOs

• [ ] Create a Gothic save slot where you changed some stuff. (e.g. moved item, killed NPC)
• [ ] Implement test to save a current state during gameplay into a save game
• [ ] Check If the saved assets match expectations when loaded
  • [ ] into G1 classic
  • [ ] into Gothic-UnZENity
• [ ] Implement Save button inside game menu

Hints:

• I figured out, that G1 save games store NPCs inside Vobs[].Type=oCNPC.
• It also stores NPCs/Monsters only! if they are nearby hero during save time.
• Also if we load a G1 save game, walk away from an NPC and save again, the updated save game won't include the far away NPC