Update bot invite URL permissions across multiple components

- Changed the permissions parameter in the bot invite URL from '8' to '4786708802825463' in env.ts, page.tsx, and lib/env.ts for improved access control.
- Updated the permissions in the landing page bootstrap.php to maintain consistency across the application.

landingpage/includes/bootstrap.php

@@ -71,7 +71,7 @@ function bot_invite_url(array $config): string
 {
     return 'https://discord.com/api/oauth2/authorize?' . http_build_query([
         'client_id' => (string) $config['bot_client_id'],
-        'permissions' => '8',
+        'permissions' => '4786708802825463',
         'scope' => 'bot applications.commands',
     ], '', '&', PHP_QUERY_RFC3986);
 }