Publish the new typography scale and guidance

[christopherthomasdesign]

By the end of the cycle, publish the new typography scale behind a feature flag in 5.2 and guidance so teams can use more accessible typography in their services.

Related to #2289

Epic lead

Owen

Driving role(s)

Developer, designer

Supporting role(s)

Technical writer

Further detail

It would be good to also review the Sass API documentation for the typography related macros – make sure it’s helpful and that the language is consistent with the guidance.

Tasks

Preview Give feedback

1. Adjust the responsive type scale govuk-frontend#2421
   +0
   
2. Review and update the content of the typography page(s) #3305
   design guidance typography +3
   
3. Apply typography feature flag to the type scale branch govuk-frontend#4629
   sass / css typography +2
   
4. Review the content in our typography technical documentation govuk-frontend-docs#421
   documentation +1
5. Work with GOV.UK to test the new typography scale #2900
   typography +1
   
6. Deprecate 14 on the font scale govuk-frontend#2786
   typography +1
   
7. Update typography classes to be consistent govuk-frontend#2798
   breaking change typography +2
8. Allow table data font size to be customised on small screens for new typography scale govuk-frontend#3922
   table typography +2
   

[36degrees]

I've linked alphagov/govuk-frontend#2786 as 'in progress' work to carry into this cycle.