Add project files (part 1/2)

Co-Authored-By: Claude Sonnet 5 <[email protected]>

third_party/minicrt/include/stdlib.h

@@ -0,0 +1,17 @@
+// Declarations of the UCRT functions the bundled C libraries (NanoVG, stb) use; the cross build has no Windows SDK.
+#pragma once
+#include <stddef.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+void *malloc(size_t);
+void *calloc(size_t, size_t);
+void *realloc(void *, size_t);
+void free(void *);
+void qsort(void *, size_t, size_t, int (*)(const void *, const void *));
+int abs(int);
+double strtod(const char *, char **);
+long strtol(const char *, char **, int);
+#ifdef __cplusplus
+}
+#endif