All Submissions:

• Have you followed the WooCommerce Contributing guideline?
• Does your code follow the WordPress' coding standards?
• Have you checked to ensure there aren't other open Pull Requests for the same update/change?

Changes proposed in this Pull Request:

This PR adds a stack component for #32634 and #32143. I'll implement functionalities in the following PRs.

How to test the changes in this Pull Request:

1. Open the plugins/woocommerce/client/admin/config/development.json and change experimental-products-task to true
2. Run pnpm nx dev woocommerce-admin
3. Go to WooCommerce > Home & click the "Add my products" task
4. Observe that the stack component is shown, including a 1.5 px Gutenberg-blue border when components are hovered.

Other information:

• Have you added an explanation of what your changes do and why you'd like us to include them?
• Have you written new tests for your changes, as applicable?
• Have you successfully run tests with your changes locally?
• Have you created a changelog file by running pnpm nx affected --target=changelog?

FOR PR REVIEWER ONLY:

• I have reviewed that everything is sanitized/escaped appropriately for any SQL or XSS injection possibilities. I made sure Linting is not ignored or disabled.