This allows for proper testing and documentation in Storybook.
I also moved the image into its own component. This required me to
adjust the vitest.config.ts slightly because it wasn't finding the image
during tests.
Since components are fully translatable, this means we have new keys
now.
Signed-off-by: André Jaenisch <andre.jaenisch@posteo.de>
I also introduce Person24 as fallback avatar and grant it a new icon in
Storybook as consequence.
Signed-off-by: André Jaenisch <andre.jaenisch@posteo.de>
