Add support for projects managed with Yarn (#13644)

TODO:
- [ ] File a PR with Yarn to add Zed to the list of supported IDEs.

Fixes: https://github.com/zed-industries/zed/issues/10107
Fixes: https://github.com/zed-industries/zed/issues/13706
Release Notes:

- Improved experience in projects using Yarn. Run `yarn dlx
@yarnpkg/sdks base` in the root of your project in order to elevate your
experience.

---------

Co-authored-by: Saurabh <79586784+m4saurabh@users.noreply.github.com>

docs/src/languages/javascript.md

@@ -142,3 +142,7 @@ You can configure ESLint's `rulesCustomizations` setting:
   }
 }
 ```
+
+
+## Yarn integration
+See [Yarn documentation](./yarn.md) for a walkthrough of configuring your project to use Yarn.