Runtime module `README.md` needs updating

[hiddeco]

It seems to be not fully up-to-date with recent changes, and we need to ensure that e.g. all flag related packages are listed, and it does not refer to removed (or changed) elements.

xref: https://github.com/fluxcd/pkg/blob/main/runtime/README.md

[Iam-Karan-Suresh]

Hi @hiddeco @pjbgf 👋
I’d like to work on this issue and help update the runtime README to reflect the latest changes (including flag-related packages and removing outdated references).
This would be my first contribution to the FluxCD codebase, and I’m excited to get started.
Please let me know if I can take this up. Thanks!

[matheuscscp]

Hi @Iam-Karan-Suresh, I assigned the issue to you, please feel free to analyze the code and suggest the changes through a PR

[Iam-Karan-Suresh]

Hello @matheuscscp
I’ve opened a PR to address this issue by aligning the runtime README with the current pkg/runtime packages and fixing outdated references.

I’d really appreciate your feedback and any suggestions for improvement.
Thank
pr: #1072