This fixes#10871.
The introduction of #11412 broke Vue.js language support, since it made
Zed rely more heavily on correct language name -> language ID mappings,
which the Vue.js extension didn't have.
Release Notes:
- N/A
This PR extracts Vue support into an extension and removes the built-in
C# support from Zed.
Release Notes:
- Removed built-in support for Vue, in favor of making it available as
an extension. The Vue extension will be suggested for download when you
open a `.vue` file.
---------
Co-authored-by: Max <max@zed.dev>
