Refactor command registration to support guild-specific commands

- Updated the command registration process to allow for instant synchronization of guild commands, while maintaining global command registration.
- Introduced optional BOT_GUILD_ID environment variable for guild-specific command handling.
- Enhanced logging to differentiate between guild and global command registrations, improving traceability.

apps/bot/src/env.ts

@@ -7,6 +7,7 @@ const EnvSchema = z.object({
   NODE_ENV: z.enum(['development', 'test', 'production']).default('development'),
   BOT_TOKEN: z.string().min(1),
   BOT_CLIENT_ID: z.string().min(1),
+  BOT_GUILD_ID: z.string().min(1).optional(),
   DATABASE_URL: z.string().url(),
   REDIS_URL: z.string().url(),
   LOG_LEVEL: z.string().default('info'),