Big first commit

authentication-zero and first layout

db/migrate/20260520205215_create_sessions.rb

@@ -0,0 +1,11 @@
+class CreateSessions < ActiveRecord::Migration[8.1]
+  def change
+    create_table :sessions do |t|
+      t.references :user, null: false, foreign_key: true
+      t.string :user_agent
+      t.string :ip_address
+
+      t.timestamps
+    end
+  end
+end