feat(bisaya-course): enhance German course content and localization support

- Updated the create-german-for-bisaya-course-content.js script to improve lesson pattern retrieval by introducing a new function for generating a lesson pattern pool.
- Added new exercises for various topics including 'Wohnung & Nachbarn', 'Besuch empfangen', 'Arzt, Apotheke, Termin', and 'Amt, Dokumente, Anmeldung', enhancing practical language skills for learners.
- Improved localization by integrating translation keys for various UI elements and error messages across multiple components, ensuring a consistent user experience in both German and Bisaya.
- Enhanced the main.js file to recognize Bisaya language preferences in browser settings, improving accessibility for users.

frontend/src/i18n/locales/en/passwordReset.json

@@ -4,6 +4,10 @@
     "email": "Email",
     "reset": "Reset",
     "success": "If the email exists, we've sent reset instructions.",
-    "failure": "Password reset failed. Please try again later."
+    "failure": "Password reset failed. Please try again later.",
+    "emailHint": "We send the link to the stored email address.",
+    "validation": {
+      "invalidEmail": "Please enter a valid email address."
+    }
   }
 }