Navigation, Bank-Setzen und AnimSet-Editor Keyframes

- CharacterNavigator: universelle Pfad-Navigation für Spieler und NPCs
  (PathFinder + Terrain-Slope-Check + Stuck-Erkennung, Walk/Run)
- PlayerInputControl: navigateTo/stopNavigation-API, Navigator hat Vorrang
  vor WASD; setNavigationSources für PathFinder + TerrainChunkState
- WorldInteractableState: Bank-Setzen komplett neu (< 5m, E-Taste),
  Navigator läuft zum Sitzpunkt, dreht Rücken zur Bank, spielt
  sit_down_bench / sitting / get_up_sitting; Bett weiterhin mit Rücklauf
- AnimSet-Editor: Kamera startet mit -45° Pitch; AnimKeyframe-Offset-Editor
- WorldScene: PathFinder + ObstacleRoot an PlayerInputControl übergeben

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

blight-assets/src/main/resources/animations/sets/human.animset.json

@@ -23,18 +23,29 @@
     "RUNNING_JUMP": "running_jump",
     "JUMP": "idle_jump",
     "PICK_UP": "pickup",
-    "SIT_UP": "stand_up",
     "SITTING": "sitting",
-    "SIT_DOWN": "sit_down_bench"
+    "SIT_DOWN": "sit_down_bench",
+    "SIT_UP": "get_up_sitting"
   },
   "previewModelPath": "Models/Chars/mainchar.j3o",
   "motionKeyframes": {
-    "sit_down_bench": [
+    "get_up_sitting": [
       {
         "time": 0.0,
         "tx": 0.0,
         "ty": 0.0,
-        "tz": 0.25,
+        "tz": -0.25,
+        "rx": 0.0,
+        "ry": 0.0,
+        "rz": 0.0
+      }
+    ],
+    "sitting": [
+      {
+        "time": 0.0,
+        "tx": 0.0,
+        "ty": 0.0,
+        "tz": -0.25,
         "rx": 0.0,
         "ry": 0.0,
         "rz": 0.0