Create USWDS Alert single directory component

skyriter → closed merge request !6

I think this is where we have to handle rendering of the SDC of the individual alert entries
https://git.drupalcode.org/project/uswds_alert/-/blob/1.0.x/src/Controll...

This is largely complete. It did result in two more tickets.

1. 🐛 Add html preprocessing for the message. Active
2. 🐛 Get CSS/scss working for SDC Active

Note, the classes should have been added as attributes to the render array, however at this time, SDC do not support attributes
✨ Process #attributes render property Active

Automatically closed - issue fixed for 2 weeks with no activity.