Feat: Update textControl to searchControl in taxonomy search.

[vipul0425]

What?

Fixes: #64593

Why?

The "Search categories" field in the Post sidebar uses a normal TextControl even though it's a search field.

How?

This PR updates the TextControl component to SearchControl in sidebar taxonomy search.

Testing Instructions

• Create any post.
• View the post settings in Sidebar and in categories it should be SearchControl now instead of normal TextControl.

[github-actions]

The following accounts have interacted with this PR and/or linked issues. I will continue to update these lists as activity occurs. You can also manually ask me to refresh this list by adding the props-bot label.

If you're merging code through a pull request on GitHub, copy and paste the following into the bottom of the merge commit message.

Co-authored-by: vipul0425 <[email protected]>
Co-authored-by: t-hamano <[email protected]>
Co-authored-by: mirka <[email protected]>
Co-authored-by: jasmussen <[email protected]>

To understand the WordPress project's expectations around crediting contributors, please review the Contributor Attribution page in the Core Handbook.

[t-hamano]

Thanks for the PR!

I think everything about the code is correct, let's get some design feedback.

Before	After

There are visual changes to the field, but I think this is acceptable.

If changes are necessary, I think it would be better to improve it at the component level, as discussed in #56388.

[jasmussen]

I'd tend to agree with Aki 👍 👍

[mirka]

Looks good to me too 👍 The label is hidden by default on SearchControl, but it's still accessibly associated to the input. And with the placeholder and search icon, it's a lot visually clearer that this is a search input, even without the visual label. So I think we're good.

[t-hamano]

Thanks everyone for your feedback. Let's merge this PR now.

@vipul0425 Thanks for the great work!