Add Last.fm support.

Problem Description

This is a perfect app, but while using external scrobblers to scrobble music, it does not send the accurate metadata. Oftentimes, just sending "Album" as the album name instead of the actual album metadata.

as you can see, the album name just shows "Album" which makes scrobbling with this app frustrating.

Proposed Solution

Adding direct support to last.fm scrobbling can be a solution to this. Third party clients like metrolist and meld already have this integration. Adding this to simpmusic would make it the perfect app.

Alternative Solutions

Even fixing the album metadata would be a solution to this. This is a problem with this app specifically, as all other music players (including 3rd party clients) succeed in sending the correct metadata. only simpmusic shows this problem.

Additional Context

While editing the metadata on Pano Scrobbler itself is a method, it is neither practical nor convenient — as no one can or wants to manually edit the metadata every single time a different song plays.

No files or tests are named in the issue. Start by locating the metadata currently sent to external scrobblers and reviewing the existing music playback metadata flow. Done means either Last.fm scrobbling works with accurate album metadata or the existing scrobbling metadata no longer reports a generic album name.