updated README to have information about the extensions, support badg…

…e, and updated api reference url

.spi.yml

@@ -1,3 +1,3 @@
 version: 1
 external_links:
-  documentation: "https://agoraio.github.io/AgoraRtcEngine_iOS/documentation/agorartckit/"
+  documentation: "https://api-ref.agora.io/en/video-sdk/ios/4.x/documentation/agorartckit"

README.md

@@ -1,34 +1,79 @@
 # Agora Swift Package Manager
 
 <p align="center">
-  <img src="https://github.com/AgoraIO/AgoraRtcEngine_iOS/actions/workflows/swiftpm-resolve.yml/badge.svg"/>
-  <a href="http://agoraio.github.io/AgoraRtcEngine_iOS/documentation/agorartckit/">
+  <a href="https://docs.agora.io/en/video-calling/overview/product-overview?platform=ios">
+    <img src="https://img.shields.io/badge/Documentation-View-F05138?logo=swift"/>
+  </a>
+  <a href="https://api-ref.agora.io/en/video-sdk/ios/4.x/documentation/agorartckit">
     <img src="https://img.shields.io/badge/API%20Reference-View-F05138?logo=swift"/>
   </a>
+  <a href="https://agora-ticket.agora.io">
+    <img src="https://img.shields.io/badge/Support-Create%20Ticket-blue?logo=jira"/>
+  </a>
   <br/>
+  <img src="https://github.com/AgoraIO/AgoraRtcEngine_iOS/actions/workflows/swiftpm-resolve.yml/badge.svg"/>
   <a href="https://swiftpackageindex.com/AgoraIO/AgoraRtcEngine_iOS" style="text-decoration: none;">
     <img src="https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2FAgoraIO%2FAgoraRtcEngine_iOS%2Fbadge%3Ftype%3Dplatforms"/>
   </a>
   <a href="https://swiftpackageindex.com/AgoraIO/AgoraRtcEngine_iOS">
     <img src="https://img.shields.io/endpoint?url=https%3A%2F%2Fswiftpackageindex.com%2Fapi%2Fpackages%2FAgoraIO%2FAgoraRtcEngine_iOS%2Fbadge%3Ftype%3Dswift-versions"/>
   </a>
 </p>
-Install Agora Video SDK easily with Swift Package Manager.
 
-![](media/swiftpm-agora.png)
+Welcome to the Agora Swift Video SDK! This package allows you to integrate powerful video capabilities into your iOS applications. You have the flexibility to choose from a variety of extensions to enhance your video communication experience.
 
-[Click here for full documentation](https://docs.agora.io/en/video-calling/overview/product-overview?platform=ios).
+For a complete understanding of how to use the SDK and its various extensions, please refer to the [full documentation](https://docs.agora.io/en/video-calling/overview/product-overview?platform=ios).
+
+![](media/swiftpm-agora.png)
 
 ## Installation
 
-Add the URL of this repository to your Xcode 12+ Project.
+To install the Agora Swift Video SDK, follow these steps:
+
+1. Open your Xcode project.
+2. Go to **File** > **Swift Packages** > **Add Package Dependency**.
+3. Paste the following URL of this repository:
+
+```
+https://github.com/AgoraIO/AgoraRtcEngine_iOS
+```
+
+4. Xcode will offer you a choice of products to add. Make sure to select **`RtcBasic`** for core functionality and choose any other extensions you require.
+
+### Available Extensions
+
+The Agora Swift Video SDK comes with various extensions that you can use to enhance your application's video capabilities:
+
+| Extension | Description |
+|-----------|-------------|
+| **RtcBasic** | Core components for real-time communication (Required). |
+| **AINS** | AI noise reduction with improved human voice fidelity, noise suppression, and de-reverberation. |
+| **AudioBeauty** | Bel Canto plugin with preset vocal effects and custom vocal effects settings. |
+| **ClearVision** | Video enhancement plugin with basic beauty, video noise reduction, low light enhancement, and color enhancement. |
+| **ContentInspect** | Video screenshot upload plugin for video content supervision. |
+| **SpatialAudio** | Spatial audio plugin for simulating spatial sound effects. |
+| **VirtualBackground** | Virtual background plugin for replacing or blurring backgrounds. |
+| **DRM** | Copyrighted DRM music plugin for playing copyrighted music in real-time interactive scenarios. |
+| **FaceDetection** | Face recognition plugin for recognizing faces or portraits. |
+| **VideoCodecEnc** | Perceptual Video Coding (PVC) insert for reducing bandwidth consumption. |
+| **VideoCodecDec** | PVC insert for improving video fluency in limited bandwidth scenarios. |
+| **ReplayKit** | Screen sharing plugin for sharing screen content with others. |
+| **VQA** | Video quality assessment plugin for scoring video quality based on subjective feelings. |
+| **AIAEC** | AI echo cancellation plugin for clear near-end human voice preservation. |
+| **SuperResolution** | Super resolution plugin for increasing remote video resolution. |
+
+For more detailed information on each extension and how to use them, refer to the [official documentation](https://docs.agora.io/en/video-calling/reference/downloads?platform=ios).
+
+
+## Troubleshooting
+
+If you encounter any issues during the installation process, try the following steps:
 
-Go to File > Swift Packages > Add Package Dependency, and paste in the link to this repository:
+In Xcode, go to File > Swift Packages > Reset Package Caches.
 
-`https://github.com/AgoraIO/AgoraRtcEngine_iOS`
+Otherwise [create a ticket](https://agora-ticket.agora.io) and our support team will get back to you ASAP.
 
 ---
 
-If you have issues installing this Swift Package:
+Feel free to explore and utilize the wide range of features provided by the Agora Swift Video SDK to create immersive and engaging video experiences in your application!
 
-In Xcode's File menu, select 'Swift Packages' and then 'Reset Package Caches'.