Merge pull request #8 from sendbird/feature/jerry/add-readme-sample

Added README for SwiftUI sample

Author: jerry-jeon

Sample/README.md

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+# Sendbird Chat SwiftUI Sample
+Sendbird Chat SwiftUI is a development kit with a declarative user interface, enabling easy and fast integration of standard chat features into new or existing client apps. This repository contains a sample app demonstrating the use of Sendbird Chat SwiftUI.
+Learn more about Sendbird Chat SwiftUI in the [documentation](https://sendbird.com/docs/chat/uikit/v3/swiftui/overview). For assistance or questions, visit [our community](https://community.sendbird.com).
+
+## Screenshots
+![Screenshot](screenshots/screenshots.png)
+
+## How to Use the Sample App
+
+### 1. Clone the Repository
+
+```bash
+git clone [email protected]:sendbird/sendbird-swiftui-ios.git
+```
+
+### 2. Open in Xcode
+
+Navigate to the sendbird-swiftui-ios/Sample directory and open it in Xcode. Make sure to open the sendbird-swiftui-ios/Sample/Sample.xcodeproj file.
+
+### 3. Run the Sample App
+Run the sample app on your simulator or device.
+
+![Sample Screenshot](screenshots/run_sample.png)
+
+### 4. Test with Your Data
+<img src="screenshots/sample_screenshot.png" alt="Sample Screenshot" width="300">
+
+For user ID and nickname, you can enter any values you like. The app will run in guest mode.
+
+> Note: Avoid using guest mode in production.
+
+## Customize with Your Data
+
+To tailor the sample app to your needs, replace the default app ID with your own. You can obtain this by [creating a Sendbird application from the dashboard](https://dashboard.sendbird.com). You can also add your own data on the dashboard to test, allowing you to experience the app with data from your Sendbird application.