feat: add theming to all Text components

[kyhyco]

What changed? Why?

• add css variables
• extend tailwind config to generate new text CSS classes
• add TextAs component which is the text primitive component
• apply new text component through out the code base
• tailwindcss integration guide

Notes to reviewers

Follow up PRs:

• Identity components + className override to text components
• background color theme

How has it been tested? locally

[Zizzamia]

@kyhyco there a couple of notes that we can follow up later, but for now I am going to merge this PR as it is a great step forward for us.