Initial frontend implementation

frontend/src/components/FileTree.js

@@ -0,0 +1,16 @@
+import React from 'react';
+
+const FileTree = ({ files }) => {
+  return (
+    <div className="file-tree">
+      <h3>Files</h3>
+      <ul>
+        {files.map((file, index) => (
+          <li key={index}>{file}</li>
+        ))}
+      </ul>
+    </div>
+  );
+};
+
+export default FileTree;