Add command to open studio to a referenced graph

[kkemple]

Description

It would be great to have a command like rover graph open <graph-ref> that would open up Apollo Studio to the referenced graph.

Use cases:

• I'm new to a graph and don't want to dig around Studio to find it
• I'm working with a graph and need to check something in Studio or maybe get the service key for CI/CD
• I'm working with a graph and want to look at each service within a federated graph (you can list subgraphs but I might want to quickly view schemas, etc)

Prior art:

• AWS Amplify CLI supports this for the underlying services the CLI creates allowing you to open AppSync, S3, and other services from the command line so you don't have to use the AWS Console.

[EverlastingBugstopper]

This sounds like a great idea! We'll make sure to triage this and add it to a milestone. Thanks for the suggestion @kkemple 😄