refactor: clean up unused imports and dead code across commands, services, and tests.

src/lib/configManager.ts

@@ -1,6 +1,5 @@
 import { readFileSync, writeFileSync } from 'fs';
 import { join } from 'path';
-import { AuroraClient } from '@/lib/BotClient';
 
 const configPath = join(process.cwd(), 'config', 'config.json');
 

src/lib/webhookUtils.ts

@@ -1,4 +1,4 @@
-import { type TextBasedChannel, User, Client } from 'discord.js';
+import { type TextBasedChannel, User } from 'discord.js';
 
 /**
  * Sends a message to a channel using a temporary webhook (imitating the bot or custom persona).