add method and route to search across tracks, albums and artists.

+ break models into separate files
+ same for the utils and setup

app/lib/populate.py

@@ -11,7 +11,7 @@ from app.lib.colorlib import ProcessAlbumColors, ProcessArtistColors
 from app.lib.taglib import extract_thumb, get_tags
 from app.logger import log
 from app.models import Album, Artist, Track
-from app.utils import run_fast_scandir
+from app.utils.filesystem import run_fast_scandir
 
 get_all_tracks = SQLiteTrackMethods.get_all_tracks
 insert_many_tracks = SQLiteTrackMethods.insert_many_tracks
@@ -72,7 +72,6 @@ class Populate:
         ProcessAlbumColors()
         ProcessArtistColors()
 
-
     @staticmethod
     def filter_untagged(tracks: list[Track], files: list[str]):
         tagged_files = [t.filepath for t in tracks]