Handle POST requests for Kubernetes Context list

{
  "type": "array",
  "items": {
    "type": "object",
    "description": "K8SContext is just used to send contexts to the UI",
    "properties": {
      "clusterName": {
        "type": "string"
      },
      "contextName": {
        "type": "string"
      },
      "currentContext": {
        "type": "boolean",
        "description": "ContextDisplayName string `json:\"context-display-name\"`"
      }
    }
  }
}