feat: implement micro-learning system with content delivery components, completion tracking hooks, and database schema migrations

src/hooks/useMicroLearnings.js

@@ -0,0 +1,17 @@
+import pb from '../lib/pb';
+
+export function useMicroLearnings() {
+  const getMicroLearningsByTopic = async (topicId) => {
+    try {
+      const records = await pb.collection('micro_learnings').getFullList({
+        filter: `topic_id = "${topicId}" && status = 'published'`,
+      });
+      return records;
+    } catch (err) {
+      console.error("Error fetching micro learnings:", err);
+      return [];
+    }
+  };
+
+  return { getMicroLearningsByTopic };
+}