[Feature Request] For Graphql requests, show QUERY or MUTATION in the request tree

* Insomnia Version: 5.15.0
* Operating System: Fedora Linux

The request tree currently shows the HTTP verb for the request i.e. GET/POST/etc.

For GraphQL requests, this isn't that useful, since all are POSTs. What would be useful there, however, is to know whether the request is a query or a mutation. Can GraphQL requests be tagged this way as opposed to the verb?

The issue identifies the request tree and GraphQL requests as the relevant entry points; start by locating their rendering and request-type handling. Done means GraphQL requests display QUERY or MUTATION instead of POST in the tree, while other requests retain their existing labels.

Written by the indexing model from the issue text.