mara: non-interactive Badge and StatusChip render identically (same
padding/radius/font, same tone-to-color mapping) and StatusChip's
4-tone/single-label shape is a strict subset of Badge's — no real
reason to keep both. Deletes StatusChip.tsx/.css, migrates AgentsPage's
config-PR chip, HivesPage's freshness chip, and ComponentsPage's own
table-status sample to Badge (tone/value, no onClick). Also drops the
now-redundant standalone StatusChip demo section on /components (the
Badge section already covers all 4 former chip tones plus accent).
Updated the two stale StatusChip references outside swarm-ui too:
design-guide.md's component-list example and colors.css's WCAG-
contrast-rationale comment.