feat: add Connected Button Group

[adrcotfas]

According to the specs, the SegmentedButton is deprecated and replaced by Connected Button Group.

• Implement the new component according to specs: https://m3.material.io/components/button-groups/overview
• Reuse newly introduced tokens (shape, motion, typography, color etc)
• Extract component specific tokens for easier maintenance.
• Get inspired from TextInput/TextField, Switch, Checkbox, FAB components which have gone through modernization.

Related tasks:

• refactor(segmented-buttons): improve state model and rendering performance #4936
• refactor(button): improve MD3 compliance and modernize content API #4928 (has a PR open already and we should reuse logic from there in this new component)