[PUI] Attachment table fix (#7232)

* Use modal hook for creating new attachments

* Add "edit" and "delete" modals for attachment table

* Fix for drag-and-drop zone

- Update to match mantine v7

* Fix link clicking

* Fix call to cancelEvent

* Add placeholder for more unit tests

src/frontend/tests/pages/pui_part.spec.ts

@@ -151,3 +151,11 @@ test('PUI - Pages - Part - Pricing (Purchase)', async ({ page }) => {
     .waitFor();
   await page.getByText('2022-04-29').waitFor();
 });
+
+test('PUI - Pages - Part - Attachments', async ({ page }) => {
+  await doQuickLogin(page);
+
+  await page.goto(`${baseUrl}/part/69/attachments`);
+
+  await page.waitForTimeout(5000);
+});