added a lot of canvas data types

nextjs/src/models/canvas/pages/canvasPageModel.ts

@@ -0,0 +1,16 @@
+export interface CanvasPage {
+  page_id: number;
+  url: string;
+  title: string;
+  published: boolean;
+  front_page: boolean;
+  body?: string;
+  // Uncomment and define if needed
+  // created_at: string; // ISO 8601 date string
+  // updated_at: string; // ISO 8601 date string
+  // editing_roles: string;
+  // last_edited_by: UserDisplayModel;
+  // locked_for_user: boolean;
+  // lock_info?: LockInfoModel;
+  // lock_explanation?: string;
+}