FEAT #8489 Mailer attachments + document

sql/develop.sql

sql/structure.sql

src/app/attachment/controllers/AttachmentController.php

src/app/attachment/models/AttachmentModelAbstract.php

...app/configuration/controllers/ConfigurationController.php

src/app/convert/controllers/ConvertPdfController.php

src/app/email/controllers/EmailController.php

src/app/email/models/EmailModel.php

src/app/resource/controllers/ResController.php