I’m in total agreement with Chris - it can’t be that difficult 
SqueezeServer / LogitechMediaServer has an option for this, and has a button-bar next to albums / songs etc in nearly every window / option.
You can do whatever you want from wherever you want : play a single track, play an album, play from a certain point in an album onwards (or not, if that’s what you prefer), add a track (or an album) to the end of your currently-playing-playlist, or insert it into the playlist next, or…