Migrate to Rais 8.0

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

app/channels/application_cable/connection.rb

@@ -1,6 +1,16 @@
-# frozen_string_literal: true
-
 module ApplicationCable
   class Connection < ActionCable::Connection::Base
+    identified_by :current_user
+
+    def connect
+      set_current_user || reject_unauthorized_connection
+    end
+
+    private
+      def set_current_user
+        if session = Session.find_by(id: cookies.signed[:session_id])
+          self.current_user = session.user
+        end
+      end
   end
 end