v0.1.0 of verdify_ui

Verdify's Flutter design system: 36 token-driven, WCAG 2.2 AA widgets with light and dark themes, built on Material 3. Changelog excerpt: First public release on pub.dev — the complete Verdify Flutter design system: 36 token-driven widgets, light + dark themes (system brightness; ADR-0030), WCAG 2.2 AA, all bound to a generated VerdifyTheme. Bundles the foundation behavior layer (roving focus, anchored overlays, live regions, the two-tone focus ring) and the cross-system a11y token fixes (ADR-0029). ### Added - VerdifyTrustScore(non-interactive status output, P3.15): displays the cross-ecosystem trust score — a calm, neut[...]