feat(workflows): migrate legacy workflows and enhance example handling

- Migrated legacy workflow files from `packages/server/workflows/` to `packages/server/data/workflows/` when the new store is empty.
- Introduced new API endpoints to list and retrieve example workflows.
- Added a dialog component for selecting example workflows when creating new workflows.
- Updated workflow paths and configurations to reflect the new structure.
- Enhanced the README and AGENTS.md documentation to clarify workflow management and usage.

Co-authored-by: Nasyarobby Putra <nasyarobby@gmail.com>

packages/web/src/api/hooks/workflows.js

@@ -28,6 +28,13 @@ export function useOwners() {
   });
 }
 
+export function useWorkflowExamples() {
+  return useQuery({
+    queryKey: ["workflow-examples"],
+    queryFn: async () => (await api.get("/workflow-examples")).data.examples,
+  });
+}
+
 export function useSaveWorkflow() {
   const qc = useQueryClient();
   return useMutation({