Issue #2856311 by wizonesolutions: Support image stamping in Webform

2856311_15_webform_stamping.patch

2856311_17_webform_stamping.patch

2856311_webform_stamping_40.patch

2856311_webform_stamping_42.patch

2856311_webform_stamping_44.patch

composer.json

fillpdf.info.yml

src/Controller/HandlePdfController.php

src/EntityHelper.php

src/Form/FillPdfFormForm.php

src/Form/FillPdfFormUploadTrait.php

src/Form/FillPdfOverviewForm.php

src/Plugin/FillPdfBackend/FillPdfServiceFillPdfBackend.php

src/Service/FillPdfLinkManipulator.php

tests/features/token_replacement.feature

tests/modules/fillpdf_test/composer.json

...f_test/config/install/webform.webform.fillpdf_contact.yml

tests/modules/fillpdf_test/fillpdf_test.info.yml

...pdf_test/src/Plugin/FillPdfBackend/TestFillPdfBackend.php

tests/src/Functional/AdminIdTest.php