Update README with new release details

Added a new section detailing the latest release (v2.2.1-alpha1) with a focus on UI responsiveness and event object refactoring.

Author: ioa747

README.md

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 https://www.autoitscript.com/forum/topic/213375-webview2autoit-autoit-webview2-component-com-interop
 
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 ### 🚀 Key Features
 
 * **Chromium Engine**: Leverage the speed and security of modern Microsoft Edge.
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 * *The registration script will check for this and provide a download link if missing.*
 
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 ### 📦 Deployment & Installation
 
 1. **Extract** the `NetWebView2Lib` folder to a permanent location.
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 ### ⚖️ License
 
 This project is provided "as-is". You are free to use, modify, and distribute it for both personal and commercial projects.
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 <p align="center">
   <img src="https://raw.githubusercontent.com/andreasbm/readme/master/assets/lines/rainbow.png" width="100%">
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 ## 🚀 What's New in v2.2.1-alpha1 - UI Responsiveness & Refactoring
 
 This release marks a major architectural milestone for the library by introducing **Event Object Refactoring**. Key events have been transitioned from passing raw data (strings) to passing full **COM-visible objects**, granting developers absolute control over the application's navigation flow.