Include arrows in pagination links

[Takshil-Kunadia]

Fixes https://github.com/WordPress/gutenberg/issues/66040

What?

Including arrows markup when creating links.

Why?

Post navigation block arrow icon aren't clickable

How?

• Create Arrows markup
• Add arrows in navigation links markup according to the block attributes selected

Testing Instructions

• Create a few posts.
• Add Post Navigation pattern in the posts.
• Try toggling including label and post title when arrows are enabled and see front end.

Testing Instructions for Keyboard

Screenshots or screencast

Before	After

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Co-authored-by: Takshil-Kunadia <[email protected]>
Co-authored-by: Mamaduka <[email protected]>
Co-authored-by: AnmolVerma404 <[email protected]>
Co-authored-by: ariful93 <[email protected]>

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[Mamaduka]

Thanks for contributing, @Takshil-Kunadia!

It looks like the referenced issue already has a PR - #67554.

[Takshil-Kunadia]

Thanks! @Mamaduka . I felt this PR provided a more complete solution. But do let me know if I should close it in favour of https://github.com/WordPress/gutenberg/pull/67554

[Mamaduka]

Thanks for the clarification, @Takshil-Kunadia!