Issue/13127 add edit sites button

[JorgeMucientes]

Closes: #13127

Description

Adds new Edit Stores button to site picker when the list displays more than 1 site. Additionally, adds a feature flag to avoid showing this new button in production builds.

No unit tests for now, as the feature is WIP and the logic is super simple at this point.

Testing information

1. Log into the app using WP.com credentials with an account that has multiple stores
2. Go to site picker
3. Check the new button Edit Stores is displayed once the store list is loaded

The tests that have been performed

The above

Images/gif

• 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.

[dangermattic]

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[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	9eeb1e2
	Direct Download	woocommerce-wear-prototype-build-pr13135-9eeb1e2.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	9eeb1e2
	Direct Download	woocommerce-prototype-build-pr13135-9eeb1e2.apk