Migrate to Rais 8.0

- Remove all Rodauth stuff and implement simple custom auth
- Migrate from sprockets to propshaft, hack some bootstrap stuff

test/application_system_test_case.rb

@@ -17,19 +17,23 @@ class ApplicationSystemTestCase < ActionDispatch::SystemTestCase
   end
 
   def login(email, password)
-    visit "/login"
+    visit "/session/new"
+    assert_selector("h1", text: "Login")
     fill_in "Login", with: email
-    fill_in "Password", with: password
+    fill_in "Passwort", with: password
     click_button "Login"
+    assert_text("Dashboard")
+    save_screenshot "after_login.png"
   end
 
   def logout
-    visit "/logout"
-    click_on "Log out"
+    Session.destroy_all
   end
 
   def login_test
-    Account.create(email: "test@example.com", password: "password")
-    login("test@example.com", "password")
+    user = User.find_or_initialize_by(email_address: "test@example.com")
+    user.update!(password: "password")
+    login(user.email_address, user.password)
+    save_screenshot "login.png"
   end
 end