Remove all 3rd party font requests

What does this MR do and why?

• Remove all 3rd party requests for fonts and css
• Move over to Atkinson Hyperlegible font family (Retain local Sarabun for Thai locale)
• Resolves issue #594 (closed)

How to set up and validate locally

Go to every page and make sure everything is normal.

MR acceptance checklist

This checklist encourages us to confirm any changes have been analyzed to reduce risks in quality, performance, reliability, security, and maintainability.

• Have you checked this doesn't interfere/conflict/duplicate someone elses work?
• Have you fully tested your changes? - I think I tested every page, but I may have missed a few.
• Have you resolved any lint issues?
• Have you assigned a reviewer?
• Have you applied correct labels?