CLI: stream server does not work

### Is there an existing issue for this?

- [X] I have searched the existing issues

### Current Behavior

No code completion in ".graphql" schema file inside vs code? Please see the video. I have installed both official extensions for vs code [here](https://marketplace.visualstudio.com/items?itemName=GraphQL.vscode-graphql) and [here](https://marketplace.visualstudio.com/items?itemName=GraphQL.vscode-graphql-syntax) but its still not giving any code completion.

Webstorm works fine without any settings but VS code does not show any autocomplete in ".graphql" file. Any help would be appreciated as after searching the web/this github repo, I still was not able to find the solution.

video https://github.com/graphql/graphiql/assets/5449692/c2dd72a8-70a2-411b-af52-7fcb8301b64e

### Expected Behavior

Syntax highlighting should work in `*.graphql` schema files

### Steps To Reproduce

1. For VS code install https://marketplace.visualstudio.com/items?itemName=GraphQL.vscode-graphql and https://marketplace.visualstudio.com/items?itemName=GraphQL.vscode-graphql-syntax
2. In a temp project create `.graphqlrc.yml` file
3. add `schema: 'schema.graphql'` section
4. create `schema.graphql` file
5. No type completion for any graphql data type

### Environment

* LSP Server Version: latest
* OS: Macos
* LSP Client: vscode

### Anything else?

_No response_