Update package actions and repository

[bozidarsevo]

Description

• Minor adaptations for the WooShippingPackagesRepository to prepare for connecting the backend response data.
• Move saving template backend request to repository

Testing information

1. Install and set up the Woo Shipping extension on your store.
2. Build and run the app with the revampedShippingLabelCreation feature flag enabled.
3. Create an order with the processing status and at least one physical product.
4. In the order details, select "Create Shipping Label."
5. Tap "Select a Package" button
6. Input values for custom package
7. Toggle switch to save template
8. Save package as template
9. Check on web that the new template with data you added is saved

Screenshots

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• 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.

[dangermattic]

	1 Warning
⚠️	This PR is larger than 300 lines of changes. Please consider splitting it into smaller PRs for easier and faster reviews.

Generated by 🚫 Danger

[wpmobilebot]

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

	App Name	WooCommerce iOS
	Build Number	pr14380-8d02b2c
	Version	21.2
	Bundle ID	com.automattic.alpha.woocommerce
	Commit	8d02b2c
	App Center Build	WooCommerce - Prototype Builds #11747

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