feat(tutorial): Tutorial model + TutorialLoader + tutorial.yaml content

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

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

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+intro: |
+  Welcome to the manor. Let me show you the ropes — just type the commands as
+  I describe them. (Type 'skip' at any time to jump straight into the game.)
+steps:
+  - instruction: "First, look around the room: type 'look'."
+    expect: look
+    confirm: "Good — 'look' (or 'l') re-describes wherever you are."
+    hint: "When you're ready, just type: look"
+  - instruction: "Examine something you noticed: 'examine <thing>' (or 'x <thing>')."
+    expect: examine
+    minArgs: 1
+    confirm: "That's how you inspect items, exits, and people up close."
+    hint: "Try examining something, e.g.: examine lamp"
+  - instruction: "Pick something up: 'take <item>'."
+    expect: take
+    minArgs: 1
+    confirm: "Taken. Things you carry go into your inventory."
+    hint: "Pick something up, e.g.: take lamp"
+  - instruction: "Check what you're carrying: 'inventory' (or 'i')."
+    expect: inventory
+    confirm: "That's your inventory."
+    hint: "Type: inventory"
+  - instruction: "Use an item: 'use <item>' — try lighting the lamp."
+    expect: use
+    minArgs: 1
+    confirm: "Some items toggle, read, or react when you use them."
+    hint: "Use something, e.g.: use lamp"
+  - instruction: "Now move to another room: 'go <direction>' (try 'go north')."
+    expect: go_direction
+    confirm: "You can move north / south / east / west between connected rooms."
+    hint: "Head to a connected room, e.g.: go north"
+  - instruction: "Travel back to a room you've already seen: 'go to <room>'."
+    expect: go_to_room
+    confirm: "Nice — 'go to <room>' auto-walks to any room you've already visited."
+    hint: "Try: go to <a room you've already visited>"
+closingTips: |
+  That's the core. A few more you'll want:
+  read · drop · talk to <npc> · give <item> to <npc> ·
+  use <item> on <item> (combine things) · map · quests · save · menu.
+  Type 'help' anytime. Good luck.