add an option to write reports to DB

[pouriyajamshidi]

Summary

We need to introduce a new flag; e.g. --write_to_db to write the data to a database. this could either be sqlite or MySQL.

Link to MySQL docs:

https://nim-lang.org/docs/db_mysql.html

Link to sqlite:

https://nim-lang.org/docs/db_sqlite.html

[pouriyajamshidi]

addressed in 7639a1f