Create automated email to mentors asking them if they have any promising applicants

[contraexemplo]

Is your feature request related to a problem? Please describe.
Yes. This aim to tackle two persistent issues in our internship cohorts:

• Lack of interest or promising applicants in specific projects;
• Ineligibility issues that only arise during the intern selection phase.

Describe the solution you'd like.
Mentors should receive one to two emails asking them if they have any promising applicants. Mentors of projects that haven't received any promising applicants will be able to communicate that to us, making it possible to promote specific projects among applicants who haven't recorded contributions yet. Mentors who have received promising applicants will be able to notify us so we can check, once more, the eligibility status of said applicants.