Add: Timer and Trigger modules with help subcommands

- Add /timer command: add, remove, list, listall, help
- Add /trigger command: add, remove, list, help
- Add /admin help and /owner help subcommands
- Add /twitch help subcommand
- Add ReminderManager for timer notifications
- Add reminders table to database
- Update README.md and AGENTS-BOT.md documentation

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

src/index.ts

@@ -6,6 +6,7 @@ import { dirname, join } from 'node:path';
 import { Command } from './structures/Command.js';
 import { DB } from './structures/Database.js';
 import { TwitchManager } from './structures/TwitchManager.js';
+import { ReminderManager } from './structures/ReminderManager.js';
 
 const __filename = fileURLToPath(import.meta.url);
 const __dirname = dirname(__filename);
@@ -59,4 +60,7 @@ for (const file of eventFiles) {
 // Start Twitch Polling
 TwitchManager.startPolling(client);
 
+// Start Reminder Polling
+ReminderManager.startPolling(client);
+
 client.login(process.env.DISCORD_TOKEN);