Check whether RPC and GraphQL endpoints are sync and running same currency

Pre-check before running a command on the network:

• Check the indexer and the RPC endpoint are sync: same block number and hash, one blocks on the indexer is accepted and should be warned
• Check they are running the same currency by checking the genesis block hash on the indexer and RPC endpoints
• Create network-check command
  • Report everything is fine with a table
• Write tests
• Global option --check/-c to turn-on (disabled by default) check at start-up
• Run checks at start-up? Slows down. Would be great for a desktop app.
  • When running network-check the checks should not be run twice: when flag on, do not run command