feat: added productSkeleton component

[Frodigo]

Description

Added product skeleton instead of the loader to fix layout shift issue on the product page.

Motivation and Context

Improving performance and UX.

How Has This Been Tested?

tested on my local, using network throttling on various types of products.

Screenshots (if appropriate):

Types of changes

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to change)

Checklist:

• My code follows the code style of this project.
• My change requires a change to the documentation.
• I have updated the documentation accordingly.
• I have read the CONTRIBUTING document.
• I have added tests to cover my changes.
• All new and existing tests passed.