Merge pull request 'OZG-6108-sidebar' (#754) from OZG-6108-sidebar into master

alfa-client/apps/admin/src/app/app.component.html

alfa-client/apps/admin/src/app/app.component.spec.ts

alfa-client/apps/admin/src/app/app.module.ts

alfa-client/libs/design-system/src/index.ts

...src/lib/icons/mailbox-icon/mailbox-icon.component.spec.ts

...stem/src/lib/icons/mailbox-icon/mailbox-icon.component.ts

...system/src/lib/icons/mailbox-icon/mailbox-icon.stories.ts

...lib/icons/orga-unit-icon/orga-unit-icon.component.spec.ts

.../src/lib/icons/orga-unit-icon/orga-unit-icon.component.ts

...em/src/lib/icons/orga-unit-icon/orga-unit-icon.stories.ts

...system/src/lib/navbar/nav-item/nav-item.component.spec.ts

...sign-system/src/lib/navbar/nav-item/nav-item.component.ts

...ign-system/src/lib/navbar/navbar/navbar.component.spec.ts

...s/design-system/src/lib/navbar/navbar/navbar.component.ts

...ibs/design-system/src/lib/navbar/navbar/navbar.stories.ts

.../design-system/src/lib/tailwind-preset/tailwind.config.js