Provide Keyboard-Accessible Link to Skip Over Navigation to Body Content

[wesleyboar]

Describe the bug
Keyboard user is not provided any "Skip Navigation" Links.

To Reproduce
Steps to reproduce the behavior:

1. Go to any Core-CMS website.
2. Navigate from top of page to body content with tab key.

Expected behavior
User is presented with a link to skip over navigation straight to body content.

Screenshots
https://github.com/user-attachments/assets/7dc99848-316f-421e-9697-2729d9f90077

Additional context

• "Skip Navigation" Links
• reported during 2026-03-19 TUP Testing Session: Release v1.1.21 (-rc1)