Enhance bot and WebUI functionality with new features and environment updates

- Added support for new environment variables in `.env.example` for public site and legal operator information.
- Integrated core commands into the bot's command structure for improved functionality.
- Implemented a new `publishBotStatus` function to update bot status in Redis, enhancing monitoring capabilities.
- Updated the landing page to include features, invite links, and support server access, improving user experience.
- Enhanced localization with new keys for core commands and landing page elements in both English and German.
- Improved error handling and logging for bot presence updates and status publishing.

apps/bot/src/env.ts

@@ -36,7 +36,17 @@ const EnvSchema = z.object({
               .filter((id) => id.length > 0)
           : []
       )
-  )
+  ),
+  WEBUI_URL: z.preprocess(emptyToUndefined, z.string().url().optional()),
+  SUPPORT_SERVER_URL: z.preprocess(emptyToUndefined, z.string().url().optional())
 });
 
 export const env = EnvSchema.parse(process.env);
+
+export function buildBotInviteUrl(clientId = env.BOT_CLIENT_ID): string {
+  const url = new URL('https://discord.com/api/oauth2/authorize');
+  url.searchParams.set('client_id', clientId);
+  url.searchParams.set('permissions', '8');
+  url.searchParams.set('scope', 'bot applications.commands');
+  return url.toString();
+}