add license, readme

LICENSE

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+MIT License
+
+Copyright (c) 2026 Hameed Abdullateef
+
+Permission is hereby granted, free of charge, to any person obtaining a copy
+of this software and associated documentation files (the "Software"), to deal
+in the Software without restriction, including without limitation the rights
+to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+copies of the Software, and to permit persons to whom the Software is
+furnished to do so, subject to the following conditions:
+
+The above copyright notice and this permission notice shall be included in all
+copies or substantial portions of the Software.
+
+THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
+SOFTWARE.

README.md

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+# Syncache
+
+An offline-first cache and sync engine for Dart and Flutter applications.
+
+## Packages
+
+| Package | Description | pub.dev |
+|---------|-------------|---------|
+| [syncache](packages/syncache) | Core caching library for Dart | [![pub package](https://img.shields.io/pub/v/syncache.svg)](https://pub.dev/packages/syncache) |
+| [syncache_flutter](packages/syncache_flutter) | Flutter integration with widgets and lifecycle management | [![pub package](https://img.shields.io/pub/v/syncache_flutter.svg)](https://pub.dev/packages/syncache_flutter) |
+
+## Features
+
+- **Multiple caching policies** - offlineFirst, cacheOnly, networkOnly, refresh, staleWhileRefresh
+- **Reactive streams** - Subscribe to cache updates with `watch()`
+- **Optimistic mutations** - Update UI immediately while syncing in background
+- **Tag-based invalidation** - Group and invalidate related cache entries
+- **Flutter integration** - Widgets, lifecycle management, connectivity detection
+
+## Quick Start
+
+### Dart
+
+```yaml
+dependencies:
+  syncache: ^0.1.0
+```
+
+```dart
+import 'package:syncache/syncache.dart';
+
+final cache = Syncache<User>(store: MemoryStore<User>());
+
+// Fetch with offline-first policy
+final user = await cache.get(
+  key: 'user:123',
+  fetch: (request) => api.getUser(123),
+);
+```
+
+### Flutter
+
+```yaml
+dependencies:
+  syncache: ^0.1.0
+  syncache_flutter: ^0.1.0
+```
+
+```dart
+import 'package:syncache/syncache.dart';
+import 'package:syncache_flutter/syncache_flutter.dart';
+
+// Provide cache to widget tree
+SyncacheScope<User>(
+  cache: userCache,
+  network: FlutterNetwork(),
+  child: MyApp(),
+)
+
+// Display cached data reactively
+CacheBuilder<User>(
+  cacheKey: 'user:123',
+  fetch: (request) => api.getUser(123),
+  builder: (context, snapshot) {
+    if (!snapshot.hasData) return CircularProgressIndicator();
+    return Text(snapshot.data!.name);
+  },
+)
+```
+
+## Documentation
+
+- [syncache documentation](packages/syncache/README.md)
+- [syncache_flutter documentation](packages/syncache_flutter/README.md)
+
+## License
+
+MIT License - see [LICENSE](LICENSE) for details.