Closes: #15050

Description

This PR adds a "View Documentation" link to the floating menu that will redirect the merchant to public facing POS docs. The URL is still a 404, so won't show the public docs.

Caveats

The Menu component has heavy limitations based on the system (slack thread: CGPNUU63E/p1738856335664189-slack-CGPNUU63E ), so the text will look properly "cut" under the right screen size, it might not be a one-liner in bigger screen sizes or in different languages. I think we can take the compromise for the moment, and explore if we should create a new component in the future, if worth it.

Testing information

• Enter in POS
• Tap the floating ellipsis ...
• Observe a web view is open with a 404. Adding a breakpoint to the view we can observe that the URL that attempts to open is https://woocommerce.com/document/woo-mobile-app-point-of-sale-mode/

• I have considered if this change warrants user-facing release notes and have added them to RELEASE-NOTES.txt if necessary.

Reviewer (or Author, in the case of optional code reviews):

Please make sure these conditions are met before approving the PR, or request changes if the PR needs improvement:

• The PR is small and has a clear, single focus, or a valid explanation is provided in the description. If needed, please request to split it into smaller PRs.
• Ensure Adequate Unit Test Coverage: The changes are reasonably covered by unit tests or an explanation is provided in the PR description.
• Manual Testing: The author listed all the tests they ran, including smoke tests when needed (e.g., for refactorings). The reviewer confirmed that the PR works as expected on all devices (phone/tablet) and no regressions are added.