Facia cards 2.0

First container under new container regime:

1. `fc-` prefix keeps new code separate from incumbent containers. adds temporary bloat but means the old stuff can be safely retired at a later date
2. presentation logic has been moved from templates/css into new slice scala modelling 

todo:
- remove old `standard`/`list` templates into single `item` template
- large media list (50% image width)
another thing that came from the current stuff. it’s hard to see why the timestamp has a min-width based on this maths, which i always think means there’s probably a good reason. if there’s not, will kill it