Added kelper plugin

[aliabbasjaffri]

• A CLI tool designed as a swiss-army knife for operations on Kubernetes pods and nodes. Kelper helps you quickly inspect container images, labels, annotations, health metrics from probes, and many other useful functionalities from your Kubernetes clusters, with support for filtering by namespace, node, and pod name.
• The tool is still under active development and i intend to release features as i go.

[linux-foundation-easycla]

• ✅login: aliabbasjaffri / (ace0012)

The committers listed above are authorized under a signed CLA.

[ahmetb]

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/kind new-plugin

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