Implement Query::nodeStatus

[limemloh]

Implement Query::nodeStatus and ActiveBakerState::nodeStatus in the Rust GraphQL API and relevant types.

This is information is not available on chain, but require polling from the node collector

Note that the frontend only depends on the following data per node:

type NodeStatus {
  id: ID!
  nodeId: String!
  nodeName: String
  averagePing: Float
  uptime: UnsignedLong!
  clientVersion: String!
  averageBytesPerSecondIn: Float!
  averageBytesPerSecondOut: Float!
  packetsSent: UnsignedLong!
  packetsReceived: UnsignedLong!
  bakingCommitteeMember: String!
  bestBlock: String!
  bestBlockHeight: UnsignedLong!
  bestArrivedTime: DateTime
  blockReceivePeriodEma: Float
  blockReceivePeriodEmsd: Float
  peersCount: UnsignedLong!
  peersList: [PeerReference!]!
  finalizedBlock: String!
  finalizedBlockHeight: UnsignedLong!
  finalizedTime: DateTime
  finalizationPeriodEma: Float
  finalizationPeriodEmsd: Float
  consensusBakerId: UnsignedLong
  blocksReceivedCount: UnsignedLong
}

The remaining fields can be omitted.

For reference, the C# GraphQL schema can be found here.