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_memory.py

@@ -0,0 +1,46 @@
+import sqlite3
+
+class NPCMemory:
+    def __init__(self):
+        self.conn = sqlite3.connect('npc_memory.db')
+        self.create_tables()
+    
+    def create_tables(self):
+        self.conn.execute('''
+            CREATE TABLE IF NOT EXISTS npc_conversations (
+                npc_id TEXT,
+                player_id TEXT,
+                message TEXT,
+                response TEXT,
+                timestamp DATETIME DEFAULT CURRENT_TIMESTAMP
+            )
+        ''')
+        self.conn.execute('''
+            CREATE TABLE IF NOT EXISTS npc_relationships (
+                npc_id TEXT,
+                player_id TEXT,
+                affinity INTEGER DEFAULT 0,
+                last_interaction DATETIME
+            )
+        ''')
+        self.conn.commit()
+
+    def log_conversation(self, npc_id, player_id, message, response):
+        self.conn.execute(
+            'INSERT INTO npc_conversations (npc_id, player_id, message, response) VALUES (?, ?, ?, ?)',
+            (npc_id, player_id, message, response)
+        )
+        self.conn.commit()
+
+    def update_affinity(self, npc_id, player_id, delta):
+        cur = self.conn.cursor()
+        cur.execute('SELECT affinity FROM npc_relationships WHERE npc_id=? AND player_id=?', (npc_id, player_id))
+        row = cur.fetchone()
+        if row:
+            new_affinity = row[0] + delta
+            cur.execute('UPDATE npc_relationships SET affinity=?, last_interaction=CURRENT_TIMESTAMP WHERE npc_id=? AND player_id=?',
+                        (new_affinity, npc_id, player_id))
+        else:
+            cur.execute('INSERT INTO npc_relationships (npc_id, player_id, affinity, last_interaction) VALUES (?, ?, ?, CURRENT_TIMESTAMP)',
+                        (npc_id, player_id, delta))
+        self.conn.commit()