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

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

app/models/playlist.py

@@ -0,0 +1,33 @@
+import json
+from dataclasses import dataclass
+
+
+@dataclass(slots=True)
+class Playlist:
+    """Creates playlist objects"""
+
+    id: int
+    artisthashes: str | list[str]
+    banner_pos: int
+    has_gif: str | bool
+    image: str
+    last_updated: str
+    name: str
+    trackhashes: str | list[str]
+
+    thumb: str = ""
+    count: int = 0
+    duration: int = 0
+
+    def __post_init__(self):
+        self.trackhashes = json.loads(str(self.trackhashes))
+        self.artisthashes = json.loads(str(self.artisthashes))
+
+        self.count = len(self.trackhashes)
+        self.has_gif = bool(int(self.has_gif))
+
+        if self.image is not None:
+            self.thumb = "thumb_" + self.image
+        else:
+            self.image = "None"
+            self.thumb = "None"