Fix: correct edge page filtering

[martonpaulo]

Issue:
Edge pages are not filtered correctly, leading to non-sequential pagination when slicing out middle pages.

pagination-bug.mp4

Cause:
The previous logic removed items from the middle of the array without considering sequential order.

Fix:

• Filter left edge pages to only include pages before the first middle page.
• Filter right edge pages to only include pages after the last middle page.

Testing:

• Verified pagination renders sequentially with parameters like:

totalPages={10}
edgePageCount={6}
middlePagesSiblingCount={1}

Please review the changes.

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