Support listing organizations

[scotwells]

This introduces a new command that can be used to list organizations the user has access to based on their Personal Access Token. This command will not work with service account based authentication.

Supports table, yaml, and json output.

$ go run . organizations list --hostname api.poc-1.env.datum.net --output table
DISPLAY NAME  RESOURCE ID
Organic Teal  izd57tciizfydaewnpa7xoe4ry

$ go run . organizations list --hostname api.poc-1.env.datum.net --output yaml
organizations:
  - name: organizations/izd57tciizfydaewnpa7xoe4ry
    organizationId: izd57tciizfydaewnpa7xoe4ry
    uid: 01JGA1QZ1W2VSFGNCV2CZD6RRT
    displayName: Organic Teal
    annotations:
      meta.datum.net/description: 'Personal Organization -  '
    createTime: "2024-12-29T20:29:25.948702Z"

$ go run . organizations list --hostname api.poc-1.env.datum.net --output json | jq
{
  "organizations": [
    {
      "name": "organizations/izd57tciizfydaewnpa7xoe4ry",
      "organizationId": "izd57tciizfydaewnpa7xoe4ry",
      "uid": "01JGA1QZ1W2VSFGNCV2CZD6RRT",
      "displayName": "Organic Teal",
      "annotations": {
        "meta.datum.net/description": "Personal Organization -  "
      },
      "createTime": "2024-12-29T20:29:25.948702Z"
    }
  ]
}

[joshlreese]

Found an unused struct. Otherwise LGTM.