Add project files (part 1/2)

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

third_party/minicrt/include/math.h

@@ -0,0 +1,12 @@
+#pragma once
+#ifdef __cplusplus
+extern "C" {
+#endif
+double sin(double); double cos(double); double tan(double); double acos(double); double asin(double); double atan(double);
+double atan2(double, double); double sqrt(double); double pow(double, double); double fabs(double); double floor(double);
+double ceil(double); double fmod(double, double); double log(double); double exp(double); double ldexp(double, int);
+float sinf(float); float cosf(float); float tanf(float); float acosf(float); float atan2f(float, float); float sqrtf(float);
+float expf(float); float powf(float, float); float fabsf(float); float floorf(float); float ceilf(float); float fmodf(float, float);
+#ifdef __cplusplus
+}
+#endif