Initial: Standalone mixer app with MixerPage, scene management, WS proxy

backend/venv/lib/python3.11/site-packages/rich/region.py

@@ -0,0 +1,10 @@
+from typing import NamedTuple
+
+
+class Region(NamedTuple):
+    """Defines a rectangular region of the screen."""
+
+    x: int
+    y: int
+    width: int
+    height: int