Provide namespaced module by default

[yajo]

I followed https://kubenix.org/examples/namespaces/ and it works very good.

However, I feel like the boilerplate required for being able to avoid repeating the namespace is too complex.

Would it be possible to just provide the namespaced submodule out of the box?

[hall]

I'd be open to providing some baseline set of kubenix submodules in this repo, yeah. My main concern is that they should be generic enough to keep maintainence low (e.g., no app-specific modules).