docs: add ARC_BROWSER_MICROSOFT_STORE

docs/ARC_BROWSER_MICROSOFT_STORE.md

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+# Arc Browser Compatibility with Microsoft Store
+
+If you have Arc browser installed from the Microsoft Store and the application cannot connect or is not working directly, you can try the following:
+
+1. Test it in the prerelease v0.1.0.
+2. Locate the installation path for Arc, for example:
+   `C:\Users\alesi\AppData\Local\Microsoft\WindowsApps\TheBrowserCompany.Arc_ttt1ap7aakyb4\Arc.exe`
+3. Open Notepad and write the following (replace the path with the one you copied):
+
+   `BROWSER_PATH=your_copied_path_here`
+5. Save the file as **“.env”** and place it in the application folder.
+6. Open Rich Presence Plus and press the "open browser" button.
+7. Open a tab at `http://localhost:9222/json`.
+8. Press the "connect" button.
+
+If this doesn't work, don't hesitate to open an issue, or for better communication, join the Discord.
+
+
+
+https://github.com/user-attachments/assets/b402a77e-6fac-4837-bc7a-32428c0c96ae
+