Clean up design tokens pre implemented

[tilucasoli]

Describe your changes

• Remove pre-implemented Space and Radius Tokens
• Remove tokens utilities for Space and Radius
• Rename space to spaces

Type of change

• New feature
• Test

Checklist before requesting a review

• [x] I have performed a self-review of my code
• [x] I have made corresponding changes to the documentation
• [x] My changes generate no new warnings
• [x] I have added tests that prove my fix is effective or that my feature works