feat(bisaya-course): expand 'Haus & Familie' lesson with new vocabulary and exercises

- Added comprehensive learning goals, core patterns, grammar focus, speaking prompts, and practical tasks for the 'Haus & Familie' lesson, enhancing the curriculum for better language acquisition.
- Updated exercise content to include multiple-choice questions and gap-fill tasks related to household vocabulary, improving user engagement and learning outcomes.
- Enhanced localization for the lesson description and vocabulary, ensuring clarity and consistency across the learning platform.

backend/scripts/create-language-courses.js

@@ -80,8 +80,8 @@ const LESSON_TEMPLATE = [
     cultural: 'Alltagsgespräche sind wichtig für echte Kommunikation.' },
   
   { week: 2, day: 1, num: 12, type: 'vocab', title: 'Haus & Familie', 
-    desc: 'Wörter für Haus, Zimmer, Familie', 
-    targetMin: 20, targetScore: 85, review: true,
+    desc: 'Haus, Räume, Familie: Balay, kwarto, kusina, sala, banyo, pamilya', 
+    targetMin: 22, targetScore: 85, review: true,
     cultural: null },
   
   { week: 2, day: 2, num: 13, type: 'conversation', title: 'Alltagsgespräche - Teil 2',