fix(add-form): swap permission check and autocreate admin

[samoehlert]

Closes #10

this makes the add form shows up on initial install. right now it also shows up fine if you're already logged in, and does not show up if you are not logged in. Aka it works correctly other than the case this fixes.

[github-actions]

File	Coverage
All files	82%	✅
config/consumers.py	78%	✅
config/urls.py	69%	✅
config/settings/base.py	69%	✅
config/settings/local.py	72%	✅
scram/route_manager/admin.py	71%	✅
scram/route_manager/models.py	70%	✅
scram/route_manager/views.py	88%	✅
scram/route_manager/api/serializers.py	92%	✅
scram/route_manager/api/views.py	74%	✅
scram/shared/shared_code.py	56%	✅
scram/templates/403.html	91%	✅
scram/templates/404.html	91%	✅
scram/templates/base.html	99%	✅

Minimum allowed coverage is 50%

Generated by 🐒 cobertura-action against 3b0c812

[crankynetman]

Ah, EXCELLENT. This has been a perpetually annoying.