feat(mat4): add mat4 basic functions

src/main.c

@@ -1,12 +1,7 @@
 #include "math/vec3.h"
 #include <stdio.h>
 
-#define printVector3(v) { printf("(%f, %f, %f)", v.x, v.y, v.z); }
-
-int main() 
+int main(void) 
 {   
-    Vec3 vec = vec3(1, 1, 1);
-    Vec3 val = vec3_add(vec, vec3(1, 2, 3));
-    printVector3(val);
     return 0;
-}
+}