Add NPC interaction system with memory and quest generation

- Introduced a new NPC system with dynamic NPCs and conversation handling.
- Implemented NPC memory using SQLite to log conversations and manage relationships.
- Added commands for talking to NPCs, listing available NPCs, and generating quests.
- Updated database schema to support NPC conversations and relationships.
- Refactored code structure to separate concerns into cogs and handlers.

LLM NPC/npc_handler.py

@@ -0,0 +1,50 @@
+import json
+import random
+
+NPC_DATABASE = {
+    "barkeep_boris": {
+        "personality": "Jovial and gossipy, knows everyone's business",
+        "backstory": "Retired adventurer who settled down after losing party to dragon",
+        "quirks": ["Offers free drinks to good storytellers", "Hates elves"]
+    },
+    "mad_wizard": {
+        "personality": "Eccentric and forgetful, brilliant but scattered",
+        "backstory": "Expelled from wizard college for 'creative' spellcasting",
+        "quirks": ["Speaks to imaginary familiar", "Offers dangerous experimental potions"]
+    }
+}
+
+class DynamicNPC:
+    def __init__(self, name, data):
+        self.name = name
+        self.personality = data["personality"]
+        self.backstory = data["backstory"]
+        self.quirks = data["quirks"]
+
+class NPCHandler:
+    def __init__(self, memory):
+        self.memory = memory
+        self.npcs = {name: DynamicNPC(name, data) for name, data in NPC_DATABASE.items()}
+
+    def chat_with_npc(self, npc_name, message, player_context):
+        npc = self.npcs.get(npc_name)
+        if not npc:
+            return "That NPC doesn't exist."
+        # Simple response logic (replace with LLM call as needed)
+        response = f"{npc.name} ({npc.personality}): I heard you say '{message}'."
+        self.memory.log_conversation(npc_name, player_context['id'], message, response)
+        self.memory.update_affinity(npc_name, player_context['id'], 1)
+        return response
+
+    def generate_quest(self, npc_name, player_level):
+        npc = self.npcs.get(npc_name)
+        if not npc:
+            return None
+        # Replace this with LLM call if available
+        quest = {
+            "title": f"{npc.name}'s Request",
+            "description": f"Help {npc.name} with a task suitable for level {player_level}.",
+            "reward": f"{random.randint(10, 100)} coins",
+            "difficulty": random.choice(["easy", "medium", "hard"])
+        }
+        return quest