feat: Add authentication templates and actions

app/actions/auth/login/show.rb

@@ -0,0 +1,27 @@
+# frozen_string_literal: true
+
+module EuchreCamp
+  module Actions
+    module Auth
+      module Login
+        class Show < EuchreCamp::Action
+          include Deps[users_repo: 'repositories.users', players_repo: 'repositories.players']
+
+          def handle(request, response)
+            player = current_player(request)
+            response.render(view, current_player: player)
+          end
+
+          protected
+
+          def current_player(request)
+            player_id = request.session[:player_id]
+            return nil unless player_id
+
+            players_repo.by_id(player_id)
+          end
+        end
+      end
+    end
+  end
+end