Initial WIP, doesn't work yet.

lms_certificate.install

lms_certificate.module

lms_certificate.services.yml

.../lms_certificate_fillpdf/lms_certificate_fillpdf.info.yml

...es/lms_certificate_fillpdf/lms_certificate_fillpdf.module

...s_certificate_fillpdf/lms_certificate_fillpdf.routing.yml

..._certificate_fillpdf/lms_certificate_fillpdf.services.yml

...les/lms_certificate_fillpdf/src/BundleFieldDefinition.php

...tificate_fillpdf/src/Controller/CertificateController.php

...rtificate_fillpdf/src/Hook/LmsCertificateFillPdfHooks.php

src/BundleFieldDefinition.php

src/Hook/LmsCertificateHooks.php