FEAT #7504 add new rest route link for view attachment

apps/maarch_entreprise/Views/signature-book.component.html

...rch_entreprise/js/angular/app/signature-book.component.ts

modules/attachments/attachments_content.php

modules/visa/class/class_modules_tools_Abstract.php

modules/visa/sign_file.php

src/app/convert/models/AdrModel.php

...app/signatureBook/controllers/SignatureBookController.php