doc: create macros.h documentation

Author: hozlucas28

libs/macros.h

@@ -2,6 +2,10 @@
 #ifndef LIBS_MACROS_H_INCLUDED
 #define LIBS_MACROS_H_INCLUDED
 
+/**
+ * @def MIN
+ * @brief Returns the minimum value between two values.
+ */
 #define MIN(A, B) ((A) < (B) ? (A) : (B))
 
 #endif  // LIBS_MACROS_H_INCLUDED