Is your feature request related to a problem? Please describe.

The Kubernetes development guide is outdated and does not reflect the recent updates

Describe the feature you are requesting, as well as the possible use case(s) for it.

• Replace old links with the correct https://github.com/absmach/magistrala-devops URL.
• Include steps for logging into private registries before fetching dependencies.
• Add examples to validate namespace creation and handle namespace stuck in "Terminating" state.
• Provide detailed steps for RE email configuration.

Indicate the importance of this feature to you.

Must-have

Anything else?

No response