Add examples project

Examples/Combine using GitHub API/README.md

@@ -0,0 +1,19 @@
+# SwiftUI-Combine-Example
+This is an example project of [SwiftUI](https://developer.apple.com/xcode/swiftui) and [Combine](https://developer.apple.com/documentation/combine) using GitHub `GET /search/users` API.  
+
+<p align="center">
+<img src="./assets/sample.png" width="250">
+</p>
+
+## :clipboard: Requirements
+- Swift5.1 Beta
+- Xcode11.0 Beta
+- iOS 13.0 Beta
+
+##  :warning: GitHub API Rate Limiting
+GitHub search API has a [rate limit rules](https://developer.github.com/v3/search/#rate-limit).  
+For unauthenticated requests, the rate limit allows you to make up to 10 requests per minute.  
+
+## :books: Credit
+- [Official SwiftUI Tutorial](https://developer.apple.com/tutorials/swiftui)
+- [Combine Apple Developer Document](https://developer.apple.com/documentation/combine)