Update SkipLink widget with design and refactor

[HedwigAR]

Pull request type

New feature (non-breaking change which adds functionality)

Test related change (New E2E test, test automation, etc.)

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Description

Updated the SkipLink widget to support multiple skip link targets, improved accessibility, and added comprehensive test coverage. Also implemented design.

What should be covered while testing?

• SkipLink should not be visible on page when the page loads
• SkipLink should become visible when focus is added (this should be done by tabbing, however the test project needs to support removing autofocus)
• When the link is clicked, focus should go to that item, even if it has no tabindex. This should added temporarily by the widget.