Add new catalog directory to store various rack-mount part configs. Also add some old beelink and mele mini pc tray configs.

rack-mount/tray/entry.scad

@@ -59,4 +59,4 @@ mountPoints = [
   );
 }
 
-traySystem();
+traySystem();

rack-mount/tray/tray.scad

@@ -89,4 +89,5 @@ module bottomScrewTray(u, trayWidth, trayDepth, trayThickness, mountPoints, moun
 
   }
 
-}
+
+}