[PUI] Add BOM import tool (#7635)

* Add "field_overrides" field to DataImportSession model

* Adjust logic for extracting field value

* Add import drawer to BOM table

* Enable download of BOM data

* Improve support for hidden errors in forms

* Improve form submission on front-end

- Handle a mix of files and JSON fields
- Stringify any objects

* Update backend validation for data import session

- Accept override values if provided
- Ensure correct data format
- Update fields for BomItem serializer

* Add completion check for data import session

* Improvements to importer drawer

* Render column selection as a table

* Add debouncing to text form fields

- Significantly reduces rendering calls

* Fix for TextField

* Allow instance data to be updated manually

* Allow specification of per-field default values when importing data

* Improve rendering of import

* Improve UI for data import drawer

* Bump API version

* Add callback after bulk delete

* Update playwright test

* Fix for editRow function

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

@@ -180,6 +180,10 @@ test('PUI - Pages - Part - Attachments', async ({ page }) => {
   await page.getByLabel('action-button-add-external-').click();
   await page.getByLabel('text-field-link').fill('https://www.google.com');
   await page.getByLabel('text-field-comment').fill('a sample comment');
+
+  // Note: Text field values are debounced for 250ms
+  await page.waitForTimeout(500);
+
   await page.getByRole('button', { name: 'Submit' }).click();
   await page.getByRole('cell', { name: 'a sample comment' }).first().waitFor();