feat: CardSidebar layout component and ExperienceCard sidebar redesign

Sidebar: period badge, company, stack tags.
Main: role title and rich-text description.

src/shared/ui/index.ts

@@ -3,7 +3,7 @@ export { Badge } from './Badge';
 export type { ButtonSize, ButtonVariant } from './Button';
 export { Button } from './Button';
 export type { CardBackground } from './Card';
-export { Card, CardContent, CardDescription, CardFooter, CardHeader, CardTitle } from './Card';
+export { Card, CardContent, CardDescription, CardFooter, CardHeader, CardSidebar, CardTitle } from './Card';
 
 export { Input, Textarea } from './Input';
 export { RichText } from './RichText';