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/ceb/register.json

@@ -0,0 +1,28 @@
+{
+  "register": {
+    "title": "Pagrehistro sa yourPart",
+    "email": "E-mail address",
+    "username": "Username",
+    "password": "Password",
+    "repeatPassword": "Usba ang password",
+    "language": "Pinulongan",
+    "languages": {
+      "en": "Iningles",
+      "de": "Aleman",
+      "ceb": "Bisaya"
+    },
+    "register": "Pagrehistro",
+    "close": "Isira",
+    "failure": "Adunay nahitabo nga sayop.",
+    "success": "Malampuson kang narehistro. Palihog susiha ang imong email aron ma-activate ang imong account.",
+    "passwordMismatch": "Dili magkapareho ang mga password.",
+    "emailinuse": "Gigamit na daan ang email address.",
+    "usernameinuse": "Dili magamit ang username.",
+    "validation": {
+      "invalidEmail": "Palihog isulod ang sakto nga email address.",
+      "usernameTooShort": "Ang username kinahanglan adunay labing menos 3 ka karakter.",
+      "passwordHint": "Kinahanglan labing menos 8 ka karakter.",
+      "passwordTooShort": "Mubo ra ang password."
+    }
+  }
+}