Improve kubectl description for better clarity

[sobit02]

What I did

• Improved the description of kubectl in the documentation

Why

• The previous description was vague and not beginner-friendly
• Added more clarity about its purpose and usage

[linux-foundation-easycla]

The committers listed above are authorized under a signed CLA.

• ✅ login: sobit02 / name: Sobit Singh (3e061af)

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[sobit02]

Hi, all checks are passing now. Please let me know if any further changes are needed. Thanks !

[Caesarsage]

Thanks @sobit02 for your contribution.

This PR seems duplicated on your other #55304

Maybe close this one and focus on that to avoid double work for reviewer

[sobit02]

Got it, thanks! I’ll consolidate everything into #55304 and push the remaining changes there.

[sobit02]

I have consolidated the changes into #55304 to avoid duplication, so I am closing this PR.