5.5.5 for Angular 20.1

@coreui/angular 5.5.5
@coreui/angular-chartjs 5.5.5
@coreui/icons-angular 5.5.5

• chore(dependencies): update to Angular 20.1
• fix(tab-list): keyboard arrows handle for rtl
• refactor(rtl.service): ensure RTL detection works regardless of HTML attribute or CSS property direction (computed style check)
• refactor(breadcrumb-router): migrate breadcrumbs$ toSignal, use attrib prop for breadcrumb-item, test update, cleanup
• fix(breadcrumb-item): remove attributes input conflicting with Element's readonly property, use attribs instead

Full Changelog: 5.5.3...5.5.5