Rover example

Example scenario for rover dev using high cpu:

• Start the api
  • cd api && go run main.go
• Start rover dev
  • rover dev --supergraph-config supergraph.yaml --router-config router.yaml
• Open Activity Monitor, find rover process, note cpu usage
• Invoke the echo query for sanity (optional)
• Stop the api
  • Subgraph is removed
  • Note cpu usage rises to ~100%
• Start the api again
  • Subgraph is added back
  • Note cpu usage remains high