feat: add query and infinite query disk caching support

packages/fl_query/example/lib/components/query_disk_cache.dart

@@ -0,0 +1,79 @@
+import 'dart:convert';
+
+import 'package:fl_query/fl_query.dart';
+import 'package:flutter/material.dart';
+import 'package:http/http.dart' as http;
+
+final queryDiskCacheExampleQuery = QueryJob<List<User>, void>(
+  queryKey: 'queryDiskCacheExampleQuery',
+  serialize: (data) {
+    return jsonEncode(data.map((user) => user.toJson()).toList());
+  },
+  deserialize: (raw) {
+    return List.from(jsonDecode(raw))
+        .map((user) => User.fromJson(user))
+        .toList();
+  },
+  task: (_, __) async {
+    final res =
+        await http.get(Uri.parse("https://jsonplaceholder.typicode.com/users"));
+    final body = List.from(jsonDecode(res.body))
+        .map((user) => User.fromJson(user))
+        .toList()
+      ..shuffle();
+    await Future.delayed(const Duration(seconds: 5));
+    return body;
+  },
+);
+
+class User {
+  int? id;
+  String? name;
+  String? username;
+  String? email;
+
+  User({this.id, this.name, this.username, this.email});
+
+  User.fromJson(Map<String, dynamic> json) {
+    id = json['id'];
+    name = json['name'];
+    username = json['username'];
+    email = json['email'];
+  }
+
+  Map<String, dynamic> toJson() {
+    final Map<String, dynamic> data = {};
+    data['id'] = id;
+    data['name'] = name;
+    data['username'] = username;
+    data['email'] = email;
+    return data;
+  }
+}
+
+class QueryDiskCacheExample extends StatelessWidget {
+  const QueryDiskCacheExample({Key? key}) : super(key: key);
+
+  @override
+  Widget build(BuildContext context) {
+    return QueryBuilder<List<User>, void>(
+      job: queryDiskCacheExampleQuery,
+      externalData: null,
+      builder: (context, query) {
+        if (!query.hasData) {
+          return const Center(child: CircularProgressIndicator());
+        }
+        return ListView.builder(
+          shrinkWrap: true,
+          itemCount: query.data?.length,
+          itemBuilder: (context, index) {
+            return ListTile(
+              title: Text(query.data![index].name!),
+              subtitle: Text(query.data![index].email!),
+            );
+          },
+        );
+      },
+    );
+  }
+}