Fix: Add isNavigationBlock utility to identify navigation blocks

[yogeshbhutkar]

What, Why and How?

While determining the Block Information, the Navigation block is incorrectly excluded as a synced block. This PR addresses and resolves that issue.

Testing Instructions

1. Navigate to the site editor.
2. Create a Navigation block.
3. Notice, the block's name is displayed in the Block Card.

Screenshots

Before

After

Closes: #68646

[Mamaduka]

@yogeshbhutkar, as mentioned in the previous PR, it's better to create an issue and discuss possible solutions before moving on to code.

I also don't think there's a need to introduce another public method just to check the block's name.

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[yogeshbhutkar]

Apologies! Let's first discuss the possible approaches in the parent issue.

Maybe, we can also expose just a single method that checks whether a block is synced. Otherwise, the array iteration method tagged in the comment would work great as well. But, I believe we should first establish if this is intended.

[youknowriad]

Thanks for working on this, @yogeshbhutkar! As discussed above, we'd rather not add a new public @wordpress/blocks API just to check a block name, and the underlying question is tracked in #49158. So I'm closing this PR. If you'd like to try the smaller approach of marking Navigation as synced in the block display information, a fresh PR linked to #49158 would be welcome.