[Woo POS] Add public-facing documentation link to POS popup menu

[AnirudhBhat]

Closes: #13454

NOTE: The POS documentation link currently returns a 404, but it is planned to be ready before the public release.

Description

This PR introduces a new popup menu item in the POS interface that allows users to access public-facing documentation. Currently, a placeholder URL is used as the final URL is yet to be finalised.

Discussion: p91TBi-cNJ-p2#comment-13978

Changes

1. Added a new "View Documentation" menu item in the POS popup menu.
2. Configured it to open a dummy URL (to be updated once the final link is available).
3. Added unit test

Testing information

1. Verified that the new menu item appears correctly in the POS popup menu.
2. Confirmed that clicking it opens the dummy URL in a browser.
3. Ensured no regressions in existing menu functionality.

The tests that have been performed

Tested both on Light and Dark mode

Images/gif

Dark	Light

Screen_recording_20250205_100820.mp4

• I have considered if this change warrants release notes and have added them to RELEASE-NOTES.txt if necessary. Use the "[Internal]" label for non-user-facing changes.

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 big (tablet) and small (phone) in case of UI changes, and no regressions are added.

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce-Wear Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce-Wear Android
	Platform	⌚️ Wear OS
	Flavor	Jalapeno
	Build Type	Debug
	Commit	88ee6c8
	Direct Download	woocommerce-wear-prototype-build-pr13466-88ee6c8.apk

[wpmobilebot]

📲 You can test the changes from this Pull Request in WooCommerce Android by scanning the QR code below to install the corresponding build.

	App Name	WooCommerce Android
	Platform	📱 Mobile
	Flavor	Jalapeno
	Build Type	Debug
	Commit	88ee6c8
	Direct Download	woocommerce-prototype-build-pr13466-88ee6c8.apk

[codecov-commenter]

Codecov Report

Attention: Patch coverage is 42.10526% with 11 lines in your changes missing coverage. Please review.

Project coverage is 37.89%. Comparing base (8418862) to head (88ee6c8).
Report is 153 commits behind head on trunk.

Files with missing lines	Patch %	Lines
...ce/android/ui/woopos/home/toolbar/WooPosToolbar.kt	0.00%	10 Missing ⚠️
...d/ui/woopos/home/toolbar/WooPosToolbarViewModel.kt	88.88%	0 Missing and 1 partial ⚠️

Additional details and impacted files

@@            Coverage Diff            @@
##              trunk   #13466   +/-   ##
=========================================
  Coverage     37.89%   37.89%           
- Complexity     8957     8959    +2     
=========================================
  Files          2050     2050           
  Lines        112086   112104   +18     
  Branches      14172    14174    +2     
=========================================
+ Hits          42477    42486    +9     
- Misses        65730    65739    +9     
  Partials       3879     3879           

☔ View full report in Codecov by Sentry.
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[malinajirka]

Thanks @AnirudhBhat! Works as expected. I've left a couple minor comments, feel free to merge this.

[malinajirka]

💡 Feels a bit off to hardcode a specific value, considering we don't know what font size and language the user will be using. What do you think about setting max-width instead?

[AnirudhBhat]

Good point. I've made it dynamic here: 88ee6c8

[AnirudhBhat]

Considering this is a very simple icon, I'm wondering if we can do something about this warning. Have you tried simplifying the vector using one of the online tools?

I've optimised the icon here: 88ee6c8