Lint Helm Charts using repo or tar.gz file as a parameter

[IAmATeaPot418]

To improve usability it would be great to directly scan helm charts using a reference to a helm repository or by directly specifying a tar.gz file that could be obtained using a helm pull on the repo. This would greatly reduce the complexity of helm chart scanning for users as it stands today.

Workflows:

1. I want to scan my helm chart that I have created.

• I package my helm chart and create a tar.gz file
• I then can run kube-linter on it before I try a helm install or upload to a repo

2. I want to scan a helm chart that is in a repo

• I can either pull the helm chart and get the tar.gz file
• I can specify the repo and the chart version so that I can pull down the chart from a repo directly.

@viswajithiii what do you think here?