feat(comp): Add descriptions for kube-context comp
feat(comp): Add descriptions for kube-context comp

Ref: HIP 0008

When completing a kube-context, extra information will be shown for
shells that support completions (fish, zsh).  For example:

$ helm --kube-context <TAB>
acc       -- accept
default   -- k3d-k3s-default
lab       -- lab
lab2      -- cluster.local

Signed-off-by: Marc Khouzam <f4a9dd7a4da9e90228a1f1935992f35508714eb1@montreal.ca>

helm/helm,bacongobbler/helm,bacongobbler/helm,helm/helm