feat(04-02): create GET /api/forms-library authenticated template list

- Queries form_templates ordered by name (asc)
- Returns 401 for unauthenticated requests
- Returns JSON array of { id, name, filename } for authenticated agents

teressa-copeland-homes/src/app/api/forms-library/route.ts

@@ -0,0 +1,16 @@
+import { auth } from '@/lib/auth';
+import { db } from '@/lib/db';
+import { formTemplates } from '@/lib/db/schema';
+import { asc } from 'drizzle-orm';
+
+export async function GET() {
+  const session = await auth();
+  if (!session) return new Response('Unauthorized', { status: 401 });
+
+  const forms = await db
+    .select({ id: formTemplates.id, name: formTemplates.name, filename: formTemplates.filename })
+    .from(formTemplates)
+    .orderBy(asc(formTemplates.name));
+
+  return Response.json(forms);
+}