Patterns Explorer: Makes the pagination items horizontally stacked on larger screens only

[amitraj2203]

What?

Fixes: #61754

Why?

The current vertical stacking of pagination items in the Patterns Explorer doesn't make optimal use of available screen space. To address this, pagination items will now stack vertically only when the viewport is below 960px width. Beyond that, they will be horizontally aligned for better visibility.

How?

This PR adds a media query to change the flex-direction.

Testing Instructions

1. Go to the post editor > Options > Preferences > Accessibility
2. Enable the 'Show button text labels' preference.
3. Close the preferences modal dialog and open the main inserter > Patterns
4. Click 'Explore all patterns'
5. Scroll the modal dialog at the bottom.
6. Observe the pagination items.

Screenshots or screencast

demo.mov

[github-actions]

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[amitraj2203]

Additionally, I noticed that the same styles for pagination items are also being applied when we go to:

1. Go to the post editor > Options > Preferences > Accessibility
2. Enable the 'Show button text labels' preference.
3. Close the preferences modal dialog and open the main inserter > Patterns
4. Click 'All'
5. Scroll the subsection to the bottom.

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So I have added separate styles for this part which will keep these items vertically stacked at all viewports but for the modal one, the items will be stacked as per the viewport.

[amitraj2203]

@WordPress/gutenberg-components Can you please review it.