Supplier Mixin (#9761)

* commit initial draft for supplier import

* complete import wizard

* allow importing only mp and sp

* improved sample supplier plugin

* add docs

* add tests

* bump api version

* fix schema docu

* fix issues from code review

* commit unstaged changes

* fix test

* refactor part parameter bulk creation

* try to fix test

* fix tests

* fix test for mysql

* fix test

* support multiple suppliers by a single plugin

* hide import button if there is no supplier import plugin

* make form submitable via enter

* add pui test

* try to prevent race condition

* refactor api calls in pui tests

* try to fix tests again?

* fix tests

* trigger: ci

* update changelog

* fix api_version

* fix style

* Update CHANGELOG.md

Co-authored-by: Matthias Mair <code@mjmair.com>

* add user docs

---------

Co-authored-by: Matthias Mair <code@mjmair.com>

src/frontend/tests/pui_permissions.spec.ts

@@ -10,7 +10,7 @@ import { doCachedLogin } from './login';
  * Test the "admin" account
  * - This is a superuser account, so should have *all* permissions available
  */
-test('Permissions - Admin', async ({ browser, request }) => {
+test('Permissions - Admin', async ({ browser }) => {
   // Login, and start on the "admin" page
   const page = await doCachedLogin(browser, {
     username: 'admin',
@@ -57,7 +57,7 @@ test('Permissions - Admin', async ({ browser, request }) => {
  * Test the "reader" account
  * - This account is read-only, but should be able to access *most* pages
  */
-test('Permissions - Reader', async ({ browser, request }) => {
+test('Permissions - Reader', async ({ browser }) => {
   // Login, and start on the "admin" page
   const page = await doCachedLogin(browser, {
     username: 'reader',