feat: add /api/versions endpoint

app/api/versions/route.ts

@@ -0,0 +1,25 @@
+// app/api/versions/route.ts
+import { NextResponse } from 'next/server';
+import { getVersions } from '@/lib/fs-utils';
+
+export async function GET(request: Request) {
+  const { searchParams } = new URL(request.url);
+  const project = searchParams.get('project');
+
+  if (!project) {
+    return NextResponse.json(
+      { error: 'Project parameter is required' },
+      { status: 400 }
+    );
+  }
+
+  try {
+    const versions = await getVersions(project);
+    return NextResponse.json(versions);
+  } catch (error) {
+    return NextResponse.json(
+      { error: 'Failed to fetch versions' },
+      { status: 500 }
+    );
+  }
+}