Change `--border-radius-circle` to `--border-radius-full`

[silverwind]

Percentage-based border-radius creates undesirable ellipse on non-square content. Instead, use pixel value and use same wording full like tailwind does, but increast to 99999px over their 9999px.

[silverwind]

CSS recently gained support for an infinity value so calc(infinity * 1px) should work in recent browsers, but I think it's still too early to make use of that. Also, it's not actually infinite.

[GiteaBot]

@silverwind please fix the merge conflicts. :tea:

[lunny]

@silverwind please resolve the conflicts.