feat: backlink projects to KWB factsheet website

Requires to have a column with a unique tidy name (as defined in Fakin) for all projects. Always small case without spaces...

For all projects a table with such an identifier needs to be prepared and added into the DB

As I now have this tidy-naming () I can now add a backlink to the factsheets for all projects that exist on the KWB website. However, this backlink needs to be language (i.e. "de", "en") specific in the index.md of each project, e.g.:

# Custom links (optional).
#   Uncomment and edit lines below to show custom links.
links:
- name: Link to Project Factsheet
   url: https://kompetenz-wasser.de/<language>/<project-id>
   icon_pack: fas
   icon: bullseye

Do do

[x] Add link to KWB project factsheet (including "language", "de" - "en" condition (https://github.com/KWB-R/pubs/commit/760ac008eeb99734f297e7daeb31e6a08379a9bc)
[x] Open in in same tab (instead of academic`s default behaviour -> open in new tab) (https://github.com/KWB-R/pubs/pull/37/commits/402c096cce5c3cf7e81fa4058f50748643d1a3dd)

KWB-R / pubs

feat: backlink projects to KWB factsheet website #8