[Enhancement] Refactor of license django model (#187)

Fixes #119

Licenses are now created in the bootstrap management command. To only create the licenses use the command line argument `-ol` or `--only-licenses`.
These licenses are then fetched by there `cc_string` when adding a license to a package.

Co-authored-by: Liam Brydon <62733830+MyCreativityOutlet@users.noreply.github.com>
Co-authored-by: jebus <lorsbach@envipath.com>
Co-authored-by: Tim Lorsbach <tim@lorsba.ch>
Reviewed-on: enviPath/enviPy#187
Co-authored-by: liambrydon <lbry121@aucklanduni.ac.nz>
Co-committed-by: liambrydon <lbry121@aucklanduni.ac.nz>

.gitea/workflows/ci.yaml

@@ -105,7 +105,7 @@ jobs:
           until pg_isready -h postgres -U postgres; do sleep 2; done
           # until redis-cli -h redis ping; do sleep 2; done
 
-      - name: Run Django migrations
+      - name: Run Django Migrations
         run: |
           source .venv/bin/activate
           python manage.py migrate --noinput