Use kubectl namespace as default

[aleksander-raskin]

I have more than 30 namespaces per k8s cluster. When using kubelive get I always start with the first one and need to switch to the correct namespace.

It would be great if kubelive could use namespace from kubectl as default (kubectl already knows what my namespace from current context)

[ameerthehacker]

@aleksander-raskin thanks for the suggestion, will add this to the next release pipeline