create a base class for all migration

+ save folder to playlist, sorting by last_mod

app/migrations/base.py

@@ -0,0 +1,16 @@
+class Migration:
+    """
+    Base migration class.
+    """
+
+    name: str
+    """
+    Name of the migration.
+    """
+
+    @staticmethod
+    def migrate():
+        """
+        Code to run when migrating
+        """
+        pass