new mod: lro.song

[o7Moon]

contains the name of the song file, within the LRA/Songs/ directory

potentially useful for other implementations using the same songs directory, but belongs here IMO

[o7Moon]

actually unsure here, having a song to sync to is ideally a common feature but this specific way of getting the song doesn't really feel like it belongs in common.

[Malizma333]

i can't think of any better way to get the song file, other than storing it directly (which is legally questionable). iirc the line rider mobile app also stores songs this way, where it references a file name in some directory.

[o7Moon]

yeah i am leaning more towards having this be common.LRASong or something like that. i guess LRA/Songs/ is actually the only place that songs for tracks have ever been stored