refactor: remove KyeType and use String for queryKey and mutationKey

packages/fl_query/example/lib/pages/infinite_query.dart

@@ -21,8 +21,7 @@ class _InfiniteQueryPageWidgetState extends State<InfiniteQueryPageWidget> {
     super.initState();
     controller.addListener(() async {
       if (controller.position.pixels == controller.position.maxScrollExtent) {
-        final query = QueryClient.of(context)
-            .getInfiniteQuery(const ValueKey("products"));
+        final query = QueryClient.of(context).getInfiniteQuery("products");
         await query?.fetchNext();
       }
     });
@@ -40,8 +39,8 @@ class _InfiniteQueryPageWidgetState extends State<InfiniteQueryPageWidget> {
       appBar: AppBar(
         title: const Text('Infinite Query'),
       ),
-      floatingActionButton: InfiniteQueryListenable(const ValueKey("products"),
-          builder: (context, query) {
+      floatingActionButton:
+          InfiniteQueryListenable("products", builder: (context, query) {
         return FloatingActionButton(
           onPressed: () {
             query?.fetchNext();
@@ -49,8 +48,8 @@ class _InfiniteQueryPageWidgetState extends State<InfiniteQueryPageWidget> {
           child: Text(query?.pages.length.toString() ?? "-69"),
         );
       }),
-      body: InfiniteQueryBuilder<PagedProducts, ClientException, String, int>(
-        const ValueKey("products"),
+      body: InfiniteQueryBuilder<PagedProducts, ClientException, int>(
+        "products",
         (page) async {
           final res = await get(Uri.parse(
             "https://dummyjson.com/products?limit=10&skip=${page * 10}",

packages/fl_query/example/lib/pages/mutation/mutation.dart

@@ -35,9 +35,9 @@ class _MutationPageState extends State<MutationPage> {
       appBar: AppBar(
         title: const Text('Mutation'),
       ),
-      body: MutationBuilder<Map<String, dynamic>, dynamic, String,
-          Map<String, dynamic>, dynamic>(
-        const ValueKey('sign-up'),
+      body: MutationBuilder<Map<String, dynamic>, dynamic, Map<String, dynamic>,
+          dynamic>(
+        'sign-up',
         (variables) {
           return Future.delayed(
             const Duration(seconds: 1),
@@ -56,9 +56,7 @@ class _MutationPageState extends State<MutationPage> {
           print('onData: $data');
           print('recoveryData: $recoveryData');
         },
-        refreshQueries: const [
-          ValueKey('hello'),
-        ],
+        refreshQueries: const ['hello'],
         builder: (context, mutation) {
           if (mutation.hasData) {
             return ListView(

packages/fl_query/example/lib/pages/query.dart

@@ -13,8 +13,8 @@ class QueryPage extends StatelessWidget {
       appBar: AppBar(
         title: const Text('Query'),
       ),
-      floatingActionButton: QueryListenable<String, dynamic, String>(
-          const ValueKey('hello'), builder: (context, query) {
+      floatingActionButton:
+          QueryListenable<String, dynamic>('hello', builder: (context, query) {
         if (query == null) {
           return const SizedBox();
         }
@@ -25,8 +25,8 @@ class QueryPage extends StatelessWidget {
           child: Text(query.data ?? 'No Data'),
         );
       }),
-      body: QueryBuilder<String, dynamic, String>(
-        const ValueKey('hello'),
+      body: QueryBuilder<String, dynamic>(
+        'hello',
         () {
           return Future.delayed(
               const Duration(seconds: 6), () => 'Hello World! $value');