Add visual studio installation

Author: Sainan

docs/Editor Integration.md

@@ -13,6 +13,7 @@ Although Pluto can theoretically be used with Lua-based tooling, we provide spec
 
 - **VS Code:** Search for `calamity-inc.pluto-syntax-highlighting` in the marketplace and press "Install."
 - **Sublime Text:** Open the command palette (Ctrl+Shift+P), select "Package Control: Install Package", search for "Pluto", and press enter.
+- **Visual Studio:** Click on Extensions > Manage Extensions. In the Online section, search for `calamity-inc.pluto-vsix` and press "Download."
 - **IntelliJ:** Clone [our syntax highlighting repository](https://github.com/PlutoLang/Syntax-Highlighting) and add the tmbundle folder to **Editor > TextMate Bundles**.
 
 If your editor is not listed here, check if it is able to load TextMate bundles, in which case you should be able to do something similar to the IntelliJ instructions above.