Add session & user management in the backend

db/migrate/20250508115812_create_users.rb

@@ -0,0 +1,12 @@
+class CreateUsers < ActiveRecord::Migration[8.0]
+  def change
+    create_table :users do |t|
+      t.string :name
+      t.string :status
+      t.string :email
+      t.string :password_digest
+
+      t.timestamps
+    end
+  end
+end

db/migrate/20250508131043_drop_notes_table.rb

@@ -0,0 +1,5 @@
+class DropNotesTable < ActiveRecord::Migration[8.0]
+  def change
+    drop_table :notes
+  end
+end