Implement typography presets

[jamesmockett]

See #1211 for the draft implementation.

Source typography presets

Tasks

Beta Give feedback

1. Confirm and stabilise preset names #1245
   🎨 Design System +1
   
2. Add presets to tokens JSON #1246
   🎨 Design System +1
   
3. Build script to export presets as CSS strings #1266
   🎨 Design System +1
   
4. Add presets to Storybook #1267
   🎨 Design System +1
   
5. Add text-decoration-thickness values to presets #1280
   🎨 Design System +1
   
6. Export presets as objects #1282
   🎨 Design System +1
   
7. Ability to get typography preset CSS with pixel values #1294
   🎨 Design System +1
   
8. Deprecate current typography API #1329
   🎨 Design System +1
   
9. Map typography presets to current API #1303
   🎨 Design System +1
   
10. Codemod to convert typography API to presets #1311
    🎨 Design System +1
    
11. Confirm with DS team whether we should expose properties like line height and font weight separately #1312
    🎨 Design System +1
    
12. Test presets in another project (DCR?)
13. Update Source React Components to use presets