Song syntax auto-formatter

[devmount]

Is your feature request related to a problem? Please describe.
Not everyone knows or remembers the SongDrive song syntax correctly. So adding a song can be faulty.

Describe the solution you'd like
A button to auto-format the song contents. The idea is, that a song content can be copied over from SongSelect or Ultimate Guitar and then a single button click suffices to format everything correctly (chord lines, part markers etc.).

Describe alternatives you've considered
A full blown import functionality with support for different platforms would be nice, but might be a little bit too much. But this can be explored when the auto-formatter works.

Additional context
None