feat: make userspace StatusCodes positive; print status text along with code in shell exec; make init return BadInvocation on faulty launch

kernel/src/Api/BuildNo.hpp

@@ -12,4 +12,4 @@
 
 #pragma once
 
-#define MONTAUK_BUILD_NUMBER 254
+#define MONTAUK_BUILD_NUMBER 264

kernel/src/Common/StatusCodes.hpp

@@ -6,9 +6,8 @@
 
 #pragma once
 
-// Syscall return status. Mirrored for userspace in
-// programs/include/montauk/statuscodes.h and, as MTK_STATUS_*, in
-// programs/include/libc/montauk.h; scripts/montauk-syscalls.py checks all three.
+// Syscall return status.
+// Mirrored in userspace with positive values at programs/include/montauk/statuscodes.h.
 enum StatusCodes {
     Success = 0,
     GenericFailure = -1,