* Add install skill for Kubeshark deployment guidance
New skill that helps users install and configure Kubeshark with a clear
CLI vs Helm decision tree, opinionated production defaults, and
platform-specific storage class recommendations.
* Add user-invocable flag to install skill frontmatter
* Add backup/overwrite check guidance for ~/.kubeshark/ config files
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Co-authored-by: Alon Girmonsky <alongir@Alons-Mac-Studio.local>
