Added readme and license

Author: Numoy

LICENSE

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+MIT License
+
+Copyright (c) 2021 QuickBird Studios
+
+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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 # Flutter platform search
+
+Flutter platform search is an abstract implementation of the Flutter search delegate. It is a time saving way to implement a platform adaptive search. 
+The example includes reference implementations for Android(Material), iOS(Cupertino) and Windows(FluentUI).
+
+If you are looking for a guide on how to use it check out the blog article: [Flutter platform search](https://www.quickbirdstudios.de/blog/flutter-platform-search)
+
+
+## Demo  
+
+| Material (Android)        | iOS (Cupertino)           | Windows (FluentUI)  |
+| :------------: |:-------------:| :-----:|
+|<img src="assets/gif/android_search_demo.gif" alt="drawing" style="width:250px;height:400px;"/>| <img src="assets/gif/iOS_search_demo.gif" alt="drawing" style="width:250px;height:400px;"/> |<img src="assets/gif/windows_search_demo.gif" alt="drawing" style="width:250px;height:400px;"/> |
+
+## 👤 Author 
+
+This example app and the blog article were created with 💙 by [QuickBird Studios](https://quickbirdstudios.com/).
+
+## 📃 License
+
+The Recipes App is released under the MIT license. See [LICENSE](LICENSE) for more information.