feat(loader): load combinations.yaml; demo matches+torch -> lit_torch

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

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

@@ -47,3 +47,19 @@
     You ease the door shut again.
   effects:
     - { setFlag: fled }
+
+- type: plain
+  id: matches
+  name: Box of Matches
+  description: A small box of dry matches. They rattle when you shake it.
+
+- type: plain
+  id: torch
+  name: Unlit Torch
+  description: A pitch-soaked torch, waiting for a flame.
+
+- type: plain
+  id: lit_torch
+  name: Lit Torch
+  description: A burning torch, throwing back the dark.
+  light: true