feat: Added --schema CLI option to status command

[jirihnidek]

• When rhc status --schema json is run, then rhc returns JSON scheme for given command. The generated schema contains description of each object property
• Only JSON scheme is supported, because --format CLI option also support "json" argument
• CLI options --format and --schema are mutually exclusive

[jirihnidek]

The output of root@localhost:/# rhc status --schema json looks like this:

{
  "$schema": "https://json-schema.org/draft/2020-12/schema",
  "$ref": "#/$defs/SystemStatus",
  "$defs": {
    "SystemStatus": {
      "properties": {
        "hostname": {
          "type": "string",
          "description": "System Hostname"
        },
        "hostname_error": {
          "type": "string",
          "description": "Optional error message of getting system hostname"
        },
        "rhsm_connected": {
          "type": "boolean",
          "description": "Is true, when connected to Red Hat Subscription Management (RHSM)"
        },
        "rhsm_error": {
          "type": "string",
          "description": "Optional error message of connecting to RHSM"
        },
        "insights_connected": {
          "type": "boolean",
          "description": "Is true, when the system is connected to Insights server"
        },
        "insights_error": {
          "type": "string",
          "description": "Optional error message of connecting to Insights server"
        },
        "yggdrasil_running": {
          "type": "boolean",
          "description": "Is true, when yggdrasil.service is running"
        },
        "yggdrasil_error": {
          "type": "string",
          "description": "Optional error message from getting status of yggdrasil.service"
        }
      },
      "additionalProperties": false,
      "type": "object",
      "required": [
        "hostname",
        "rhsm_connected",
        "insights_connected",
        "yggdrasil_running"
      ]
    }
  }
}