+ xo-alloc + xo-object + xo-alloc docs + GC utests

xo-alloc/src/alloc/AllocPolicy.cpp

@@ -0,0 +1,13 @@
+/* AllocPolicy.cpp
+ *
+ * author: Roland Conybeare, Jul 2025
+ */
+
+#include "AllocPolicy.hpp"
+
+/* note: inline/.hpp definition not allowed for operator delete */
+void operator delete(void * ptr) noexcept {
+    xo::xo.free(ptr);
+}
+
+/* end AllocPolicy.cpp */