Doc: Add JSDoc and update README for BlockCard component

[Infinite-Null]

Part of: #67165
Follow up of: #67191

What?

• Add JSDoc documentation to the BlockCard component.
• Update README.md to document the name prop, which was previously missing.

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Co-authored-by: Infinite-Null <[email protected]>
Co-authored-by: t-hamano <[email protected]>

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[Infinite-Null]

Hi @t-hamano,
This is a follow-up PR for #67191 addressing the feedback in this comment. It adds JSDoc and includes the name prop in the README.md. Please have a look at it at your convenience.

[t-hamano]

Thanks for the PR!

[Infinite-Null]

Hi @t-hamano,

I’ve implemented the suggested changes and resolved the merge conflict. When you have a moment, could you please review it. Thank you!

[t-hamano]

LGTM 👍