[Shipping Revamp] Introduce Package selection flow

[ThomazFB]

Closes: #

Description

Steps to reproduce

Testing information

The tests that have been performed

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• 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.

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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]

	2 Errors
🚫	Please add tests for class WooShippingLabelsPackageCreationViewModel (or add unit-tests-exemption label to ignore this).
🚫	Please add tests for class ViewState (or add unit-tests-exemption label to ignore this).

	1 Message
📖	This PR is still a Draft: some checks will be skipped.

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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	e70de84
	Direct Download	woocommerce-wear-prototype-build-pr12757-e70de84.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	e70de84
	Direct Download	woocommerce-prototype-build-pr12757-e70de84.apk