It will search for two things, song lyrics text and chordpro formatted text (.crd file).
I will need an app that finds the links and saves them and updates a database that can be uploaded to a website.
It will need to create a csv file with SONGNAME, BY (performer or artist etc), LYRICS_LINK, CRD_FILE_LINK.
It will also need to maintain that list by check those links and removing them when they no longer work.
Open source or commercial programs may be used and set up on my computer.