Add kubectl-node-debug plugin

[tayeh]

This PR adds kubectl-node-debug, a Krew plugin that allows users to debug Kubernetes nodes (access shell).

[ahmetb]

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/kind new-plugin

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• ✅ login: tayeh / name: Mohammed Tayeh (1985125, afa0116, 49dae21)

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[ahmetb]

We already have a dozen node debug plugins here in this repo. Does this add that much functionality that others don't have?

[tayeh]

We already have a dozen node debug plugins here in this repo. Does this add that much functionality that others don't have?

Hi @ahmetb,

I've been using this method for a long time and recently decided to publish it as a tool.
I checked the repository and found:

• node-admin: Uses nsenter within a pod.
• node-shell: Works similarly to node-admin, using nsenter within a pod.

The key difference in my plugin is that it does not create a new pod or rely on external commands. Instead, it leverages kubectl debug to streamline the process.

Would love to hear your thoughts!