Configure initial style-dictionary

[viktorrusakov]

Can be done only after #1542

After successfully categorizing SCSS variables into design tokens we are ready to build initial configuration of style dictionary.

AC

• create all necessary JSON files according to the schema defined in #1542
• Configure style-dictionary to include the following platforms
  • CSS variables
  • SCSS variables
  • Nice to have CSS utility classes (may need a custom formatter)

Notes

• you can use https://github.com/openedx/paragon/tree/ags/style-dictionary-poc branch as a baseline for you PR
• useful link about style dictionaries
  • https://github.com/amzn/style-dictionary
  • https://amzn.github.io/style-dictionary/#/architecture