refactor the OSV scanner from the ground up

[ptzianos]

This is a complete refactoring of the OSV scanner. The OSV scanner is written in Go, so there is no reason for us to not use it a s a library so that we can configure it more easily and not having to parse its output from a file but directly use the data structures from it and convert them into OCSF.
Under normal circumstances, OSV scanner scans the entire repository for dependency files and outputs the results. We are not interested in tackling every single language out there, we are interested in producing good results, so for the time being we dedicate the scanner to Go, JS and Elixir, with more to be added as time goes. The results should always contain the lines of the dependency file where a vulnerable file is declared