Does a lot of work towards the PIT

Added a math library, with clamp and POW.
added printf support for printing doubles
added a few helper functions in PIT for calcaulting the time in seconds of a clock cycle based on divisor

libc/math/pow.c

@@ -0,0 +1,9 @@
+#include <math.h>
+
+int pow(int base, int exp)
+{
+	int res = base;
+	for (int i = 0; i < exp; i++)
+		res *= base;
+	return res;
+}