fix(shell): parameter namespace is being ignored

[viniciusartur]

This PR addresses the issue reported on #159 where the parameter namespace is being ignored when the Kubernetes context is set via kubectl config set-context.

Tested with:

❯ kubectl config set-context --current --namespace=test                                                                                                                                    
Context "default" modified.

❯ ./dist/cyphernetes shell 
...
(default) test » 

❯ ./dist/cyphernetes shell --namespace default
...
(default) default » 

❯ kubectl config set-context --current --namespace=default                                                                                                                                  
Context "default" modified.

❯ ./dist/cyphernetes shell 
...
(default) default » 

❯ ./dist/cyphernetes shell --namespace test
...
(default) test » 

❯ ./dist/cyphernetes shell -A 
...
(default) ALL NAMESPACES »

[AvitalTamir]

Cheers @viniciusartur this is great, I think this line was an early artifact from before we were using the default config loading rules.

Thanks for catching and fixing this!