Initial snapshot: hand motion pipeline (Dyn-HaMR + dex-retargeting + SPIDER)

Co-Authored-By: Claude Fable 5 <noreply@anthropic.com>

third_party/Dyn-HaMR/third-party/DROID-SLAM/thirdparty/eigen/blas/xerbla.cpp

@@ -0,0 +1,23 @@
+
+#include <stdio.h>
+
+#if (defined __GNUC__) && (!defined __MINGW32__) && (!defined __CYGWIN__)
+#define EIGEN_WEAK_LINKING __attribute__ ((weak))
+#else
+#define EIGEN_WEAK_LINKING
+#endif
+
+#ifdef __cplusplus
+extern "C"
+{
+#endif
+
+EIGEN_WEAK_LINKING int xerbla_(const char * msg, int *info, int)
+{
+  printf("Eigen BLAS ERROR #%i: %s\n", *info, msg );
+  return 0;
+}
+
+#ifdef __cplusplus
+}
+#endif