add sifrovacka detail page + models

.gitignore

django_apps/settings.py

requirements.txt

sifrovacka/admin.py

sifrovacka/migrations/0001_initial.py

sifrovacka/migrations/0002_auto_20210812_0714.py

sifrovacka/migrations/0003_auto_20210812_0733.py

sifrovacka/migrations/0004_participants.py

...rations/0005_rename_participate_participants_is_active.py

...migrations/0006_rename_is_active_participants_inactive.py

...cka/migrations/0007_alter_participants_unique_together.py

sifrovacka/models.py

sifrovacka/templates/home.html

sifrovacka/templates/index.html

sifrovacka/templates/sifrovacka.html

sifrovacka/urls.py

sifrovacka/views.py