feat: rename 'ZenithOS' => 'MontaukOS' and fix build system issues

kernel/src/Api/Random.hpp

@@ -7,7 +7,7 @@
 #pragma once
 #include <cstdint>
 
-namespace Zenith {
+namespace Montauk {
 
     // ---- Random number generation ----
     // Uses RDTSC mixed with xorshift64* PRNG for entropy.