Add support for Developer categories API calls

[mxr576]

Is your feature request related to a problem? Please describe.
no.

Describe the solution you'd like
Add support for CRUDL developer categories via /mint/organizations/{org_name}/developer-categories endpoint. Currently, this is missing from the API client, if I remember correctly it was not added because developer categories API was (is?) marked as deprecated, yet as I can see it is still actively used. (At least on the project that I am working on at this moment.)

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.

[mxr576]

sudo re-open

[mxr576]

@giteshk @phdhiren please consider re-opening this issue, this is a still missing feature. Thank you

[github-actions]

This issue has been automatically marked as stale because it has not had recent activity. It will be closed if no further activity occurs. Thank you for your contributions.