This PR contains the work done to implement the rendering of the (lack of) repositories in the `MenuBarView` view UI interface. For this purpose, some components have been created: `ListHeader`, `ListItemEmpty`, and `ListItem`. Furthermore, some preview-specific code have been implemented as well, specially to add dummy repositories to the previews.
Reviewed-on: #4
Co-authored-by: Javier Cicchelli <javier@rock-n-code.com>
Co-committed-by: Javier Cicchelli <javier@rock-n-code.com>