Added qhelp for UnhandledStreamPipe query

javascript/ql/src/Quality/examples/UnhandledStreamPipe.js

@@ -0,0 +1,6 @@
+const fs = require('fs');
+const source = fs.createReadStream('source.txt');
+const destination = fs.createWriteStream('destination.txt');
+
+// Bad: No error handling
+source.pipe(destination);

javascript/ql/src/Quality/examples/UnhandledStreamPipeGood.js

@@ -0,0 +1,17 @@
+const { pipeline } = require('stream');
+const fs = require('fs');
+const source = fs.createReadStream('source.txt');
+const destination = fs.createWriteStream('destination.txt');
+
+// Good: Using pipeline for automatic error handling
+pipeline(
+  source,
+  destination,
+  (err) => {
+    if (err) {
+      console.error('Pipeline failed:', err);
+    } else {
+      console.log('Pipeline succeeded');
+    }
+  }
+);

javascript/ql/src/Quality/examples/UnhandledStreamPipeManualError.js

@@ -0,0 +1,16 @@
+const fs = require('fs');
+const source = fs.createReadStream('source.txt');
+const destination = fs.createWriteStream('destination.txt');
+
+// Alternative Good: Manual error handling with pipe()
+source.on('error', (err) => {
+  console.error('Source stream error:', err);
+  destination.destroy(err);
+});
+
+destination.on('error', (err) => {
+  console.error('Destination stream error:', err);
+  source.destroy(err);
+});
+
+source.pipe(destination);