add models for Project, Task, Note, Category

db/migrate/20250611174428_create_notes.rb

@@ -0,0 +1,13 @@
+class CreateNotes < ActiveRecord::Migration[8.0]
+  def change
+    create_table :notes do |t|
+      t.string :title
+      t.text :description
+      t.boolean :pinned
+      t.boolean :archived
+      t.references :project, null: false, foreign_key: true
+
+      t.timestamps
+    end
+  end
+end