feat: Move from styled-system to own solution

[tchock]

styled-system hasn't been maintained in a while and it is lacking some features that we want to use (like using styled functions inside styled components). So we will go back to a custom solution for it.

[github-actions]

size-limit report 📦

Path	Size
Common JS	28.09 KB (-2.08% 🔽)
Button direct import (Common JS)	11.29 KB (-4.53% 🔽)
ES Next	28.1 KB (-1.87% 🔽)
Button Treeshaking	8.35 KB (-7.49% 🔽)
Input Treeshaking	5.23 KB (-12.01% 🔽)
Tooltip Treeshaking	8.27 KB (-8.17% 🔽)
ES Module	23.49 KB (-2.83% 🔽)
UMD Bundle	21.17 KB (-1.75% 🔽)