Adds a "Download VSIX" button next to Install, copying its style exactly.

Microsoft removed the built-in Download VSIX button from the Visual Studio Marketplace.
This decision has made it more difficult for developers in environments without direct internet access to install extensions.
This script restores that functionality in a seamless way.
itemName in the page URL..vsix file for the latest version.For the Python extension at:
https://marketplace.visualstudio.com/items?itemName=ms-python.python
The script generates a download link to:
https://marketplace.visualstudio.com/_apis/public/gallery/publishers/ms-python/vsextensions/python/latest/vspackage
Install a userscript manager if you don’t already have one:
Install this script from Greasy Fork.
Visit any Visual Studio Marketplace extension page — the Download VSIX button will appear right next to Install.
publisher.extension ID from the page URL.latest/vspackage download link for that extension.href, and inserts it beside Install.This project is licensed under the GNU General Public License v3.0.
Developed with ❤️ by Brandon Henness