[Aperture] Add publishing page branding and features
Description; purpose of this task is to style and build out journal publishing/preprint server features the could be utilised by Aperture. All journal publishers should benefit from these features, and styling should be aligned with each publisher brand e.g. colours and logo
Reference; Aperture publishing page (current state)
- Manuscript content structure data (HTML) should be pulled from Kotahi.
- Publishing page stylesheet should be in Flax.
- Ability to include additional pages e.g. 'About us' page