feat: restructure core status response

[shumkov]

Issue being fixed or feature implemented

This pull request implements a new structure for core getStatus response.

What was done?

• fea!t: restructured core status response

How Has This Been Tested?

• embedded tests

Breaking Changes

• structure of getStatus has changed to the below format :

version: {
      protocol: networkInfo.protocolversion (uint32),
      software: networkInfo.version (uint32),
      agent: networkInfo.subversion (str),
}
time: {
   now: Date.now() (uint32)
   offset: networkInfo.timeoffset (int32),
   median: blockchainInfo.mediantime (uint32),
}
status: enum: not started, syncing, ready (chain.isSynced && masternode.isSynced),
syncProgress:  blockchainInfo.verificationprogress (double),
chain: {
   name: blockchainInfo.chain (str),
   blocksCount: blockchainInfo.blocks (uint32),
   headersCount: blockchainInfo.headers (uint32),
   bestBlockHash: blockchainInfo.bestblockhash (binary),
   difficulty: blockchainInfo.difficulty (double),
   chainWork: blockchainInfo.chainwork (binary),
   isSynced:  mnsync status.isBlockchainSynced (bool),
   syncProgress:  blockchainInfo.verificationprogress (double),
}
masternode: {
   state: "masternode status".state (enum),
   proTxHash: "masternode status".proTxHash (binary),
   posePenalty: "masternode status".dmnState.PoSePenalty (unit32)
   isSynced: mnsync status.isSynced (boolean),
   syncProgress:  mnsync status.AssetId (double)
}
network: {
   peersCount: networkInfo.connections  (unit32),
   fee: {
      relay: networkInfo.relayfee (double)
      incremental: networkInfo.incrementalfee (double)
   }
} 

Checklist:

• I have performed a self-review of my own code
• I have commented my code, particularly in hard-to-understand areas
• I have added or updated relevant unit/integration/functional/e2e tests
• I have made corresponding changes to the documentation

For repository code-owners and collaborators only

• I have assigned this pull request to a milestone