feat:added api command to support a GET request against any octopus api endpoint

[benPearce1]

Adds a new command: api

Will allow supporting OIDC login via the login command to access any endpoint URL

> octopus api /api/spaces/Spaces-1/tenants/Tenants-1

{
  "Id": "Tenants-1",
  "Name": "eyore",
  "TenantTags": [
    "tags/all"
  ],
  "CustomFields": [],
  "ProjectEnvironments": {
    "Projects-21": [
      "Environments-2"
    ]
  },
  "SpaceId": "Spaces-1",
  "ClonedFromTenantId": null,
  "Description": "",
  "Slug": "eyore",
  "IsDisabled": false,
  "Icon": null,
  "Links": {
    "Self": "/api/Spaces-1/tenants/Tenants-1",
    "Variables": "/api/Spaces-1/tenants/Tenants-1/variables",
    "Web": "/app#/Spaces-1/tenants/Tenants-1",
    "Logo": "/api/Spaces-1/tenants/Tenants-1/logo?cb=0.0.0-local"
  }
}

> octopus api /api/spaces/Spaces-1/tenants/Tenants-1 | jq -r '.Name'
eyore