Document chain api endpoints not present currently in docs

[nsjames]

the current task is a continuation of this one: https://github.com/orgs/eosnetworkfoundation/projects/18/views/21?pane=issue&itemId=23127963

there are 4 more which are not documented:

/get_code_hash /get_producer_schedule /get_transaction_id /send_read_only_transaction /push_block

AC:

• Update chain API swagger files
• Include:
  • Input parameters
  • Output results
  • Brief description about what the route does

[iamveritas]

done https://github.com/eosnetworkfoundation/docs-ui/pull/4 https://github.com/AntelopeIO/leap/pull/1208 https://github.com/AntelopeIO/leap/pull/1204