GetDeployments error handling and response type added

[BRTZL]

Whats Added:

• error handling on GetDeployments function
• response type for GetDeployments function

Example Response 🚀

[
  {
    "clusterName": "exampleClusterName",
    "deployments": [],
    "error": null
  }
]

[mstrYoda]

Thanks for your pr. Can you please create an issue for error handling and create seperate pr for it? You can reference to that issue in your commit message.