[Dashboard] Implement copy editing action

We have the possibility to send with a back-end the email to our copy editing editor on the following API endpoints :  

- `/api/articles/docx/email` : send an email and take a body + pid of the article to generate the corresponding docxfile
- `/api/articles/docx` : just generate the docx with pid

For the contact email form we can reuse the one we have already for abstract submitted ✅ 

