Distribute the plugin with the Krew

[Dentrax]

It'd be great to make this plugin installable with krew:

https://krew.sigs.k8s.io/docs/developer-guide/distributing-with-krew/

So that devs just do:

1. krew install kubectl-ai
2. kubectl ai ...

[LinPr]

It seems still under discussing
kubernetes-sigs/krew-index#4555

[droot]

@Dentrax as much as we would like, I think it's not happening because ai plugin name is too broad to be accepted in the default krew index :(.

[droot]

Good news, we have made progress on getting it in the default krew index, so should happen soon.