Implementing enum references for columns and filters

gui/rpk-gui/src/pages/firm/ContractRoutes.tsx

@@ -25,6 +25,8 @@ export const ContractRoutes = () => {
 const ListContract = () => {
   const columns = [
     { field: "label",  column: { flex: 1 }},
+    { field: "status",  column: { width: 160 }},
+    { field: "updated_at", column: { width: 160 }},
   ];
   return <List<Contract> resource={`contracts`} schemaName={"Contract"} columns={columns} />
 }