add readme

Author: jjw24

README.md

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+# BrowserTabs
+
+BrowserTabs is a .NET library for retrieving all open tabs from Chromium-based browsers (such as Microsoft Edge, Google Chrome, Brave, Vivaldi, Opera, and Chromium) on Windows.  
+
+## Features
+
+- Enumerate all open tabs across multiple Chromium-based browsers.
+- Retrieve tab title, URL, active status, tab index, and browser name.
+- Activate (bring to foreground) or close browser tabs programmatically.
+- Supports multi-window scenarios (pop-outs, incognito, etc.).
+
+## Usage
+
+1. Reference the `BrowserTabs` library in your .NET project.
+2. Call `BrowserTabManager.GetChromiumTabs()` to get a list of all open tabs.
+3. Use `BrowserTabManager.ActivateTab(tab)` or `BrowserTabManager.CloseTab(tab)` to interact with tabs.
+
+````````
+
+# TODO:
+1. Handle grouped tabs
+2. Fix tab URL extraction logic
+3. Optimize tab retrieval logic for better performance