Add missing file

bifurcation · bifurcation · commit 4c844e11a4b7 · 2025-05-12T14:30:59.000-04:00
diff --git a/cmake/namespace.h.in b/cmake/namespace.h.in
@@ -0,0 +1,4 @@
+#pragma once
+
+// Configurable top-level namespace
+#define SFRAME_NAMESPACE @SFRAME_CXX_NAMESPACE@
