Update the FOCUS styles in ZeroHeight & figma

[turolopezsanabria]

Based on this conversation and this PR, and this conversation

Figma: Effekt -> Focus style

Compare Storybook with Figma.

box-shadow: 0 0 0 2px rgb(var(--colors-background)), 0 0 0 4px blue;

box-shadow: 0 0 0 0 rgb(var(--colors-background)) inset, 0 0 0 2px blue inset;

• [x] button
• [x] checkbox
• [x] chips
• [x] iconButton
• [x] TextLink
• [x] RadioButton
• [x] Switch
• [x] Tabs

[JeremiasUX]

Brand foundations need to be updated as well (Figma and ZH)

[Bibisirius]

Approved and ready for publication ✅

[Bibisirius]

Done ✅