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.

message_command_stats.json

@@ -0,0 +1,35 @@
+{
+  "messages": {
+    "601579326714019840": {
+      "total": 32,
+      "commands": 27,
+      "non_commands": 5
+    }
+  },
+  "commands": {
+    "purge": 2,
+    "mail_feedback": 1,
+    "help": 5,
+    "nuke": 1,
+    "ping": 1,
+    "top": 1,
+    "stats": 1,
+    "poker": 7,
+    "balance": 2,
+    "daily": 1,
+    "withdraw": 1,
+    "leaderboard": 1,
+    "afk": 1,
+    "afklist": 1,
+    "whois": 1
+  },
+  "channels": {
+    "bot": 32
+  },
+  "guilds": {
+    "Plex": 32
+  },
+  "total_messages": 0,
+  "command_messages": 0,
+  "non_command_messages": 0
+}