chore: add start.sh script

scripts/shuffle.js

@@ -0,0 +1,41 @@
+const fs = require('fs');
+const path = require('path');
+
+function shuffleArray(array) {
+    for (let i = array.length - 1; i > 0; i--) {
+        const j = Math.floor(Math.random() * (i + 1));
+        [array[i], array[j]] = [array[j], array[i]];
+    }
+}
+
+function processFile(filePath) {
+    const data = JSON.parse(fs.readFileSync(filePath, 'utf8'));
+    let qCount = 0;
+    let ansCounts = {0: 0, 1: 0, 2: 0, 3: 0};
+
+    const processQuestion = (q) => {
+        const correctOpt = q.opts[q.ans];
+        shuffleArray(q.opts);
+        q.ans = q.opts.indexOf(correctOpt);
+        ansCounts[q.ans] = (ansCounts[q.ans] || 0) + 1;
+        qCount++;
+    };
+
+    if (data.sets) {
+        data.sets.forEach(set => set.questions.forEach(processQuestion));
+    } else if (data.questions) {
+        data.questions.forEach(processQuestion);
+    }
+
+    fs.writeFileSync(filePath, JSON.stringify(data, null, 2) + '\n', 'utf8');
+    console.log(`Processed ${path.basename(filePath)}: ${qCount} questions. Distribution:`, ansCounts);
+}
+
+const files = [
+    'questions.json',
+    'scripts/data/set-dart-dev.json',
+    'scripts/data/set-flutter-basic.json',
+    'scripts/data/set-flutter-dev.json'
+];
+
+files.forEach(f => processFile(path.join(__dirname, '..', f)));