refactor: use class as playlists container

src/aura_engine/scheduling/domain.py

@@ -200,9 +200,34 @@ class Playlist:
         return s
 
 
-Playlists = NamedTuple(
-    "Playlists", [("timeslot", Playlist), ("schedule", Playlist), ("show", Playlist)]
-)
+class Playlists:
+    """
+    Container to hold all timeslot assignable types of playlists.
+
+    Attributes:
+        timeslot (Playlist): The playlist assigned on timeslot level.
+        schedule (Playlist): The playlist assigned on schedule level.
+        show (Playlist): The playlist assigned on show level.
+
+    """
+
+    timeslot: Playlist
+    schedule: Playlist
+    show: Playlist
+
+    def __init__(self, timeslot: Playlist, schedule: Playlist, show: Playlist):
+        """
+        Initialize.
+
+        Args:
+            timeslot (Playlist): The playlist assigned on timeslot level.
+            schedule (Playlist): The playlist assigned on schedule level.
+            show (Playlist): The playlist assigned on show level.
+        """
+        self.timeslot = timeslot
+        self.schedule = schedule
+        self.show = show
+
 
 Show = NamedTuple(
     "Show",