feat(content): victory & flee endings; front-door flee switch

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

Semesterprojekt/src/main/resources/world/endings.yaml

@@ -0,0 +1,14 @@
+- id: victory
+  title: "The Manor Reclaimed"
+  victory: true
+  when: [{ flag: manor_secured }]
+  text: |
+    The lights hold steady and the whispers fade to nothing. Whatever held
+    this place has loosened its grip. The manor is yours now.
+- id: fled
+  title: "Into the Night"
+  victory: false
+  when: [{ flag: fled }]
+  text: |
+    You wrench the front door open and bolt into the dark. Safe — but the
+    manor keeps its secrets, and they will keep you awake for years.

Semesterprojekt/src/main/resources/world/items.yaml

@@ -34,3 +34,15 @@
     You pull the lever back; the manor falls dark again.
   effects:
     - { setFlag: power_on }
+
+- type: switchable
+  id: front_door
+  name: Front Door
+  description: The heavy front door. It would let you leave the manor for good.
+  initialState: false
+  onText: |
+    You haul the front door open and step out into the cold night.
+  offText: |
+    You ease the door shut again.
+  effects:
+    - { setFlag: fled }

Semesterprojekt/src/main/resources/world/rooms.yaml

@@ -7,7 +7,7 @@
     north: hallway
     east: cellar
     south: dungeon
-  items: [letter, lamp]
+  items: [letter, lamp, front_door]
   npcs: [old_man]
   exitLocks:
     - direction: east