BuildSystem: Move all userpace libraries under the userspace directory

As the number of libraries is increasing, root directory starts to
expand. This adds better organization for libraries

userspace/libraries/LibC/include/stdint.h

@@ -0,0 +1,117 @@
+#ifndef _STDINT_H
+#define _STDINT_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/stdint.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+typedef __INT8_TYPE__ int8_t;
+typedef __INT16_TYPE__ int16_t;
+typedef __INT32_TYPE__ int32_t;
+typedef __INT64_TYPE__ int64_t;
+
+typedef __UINT8_TYPE__ uint8_t;
+typedef __UINT16_TYPE__ uint16_t;
+typedef __UINT32_TYPE__ uint32_t;
+typedef __UINT64_TYPE__ uint64_t;
+
+typedef __INT_LEAST8_TYPE__ int_least8_t;
+typedef __INT_LEAST16_TYPE__ int_least16_t;
+typedef __INT_LEAST32_TYPE__ int_least32_t;
+typedef __INT_LEAST64_TYPE__ int_least64_t;
+
+typedef __UINT_LEAST8_TYPE__ uint_least8_t;
+typedef __UINT_LEAST16_TYPE__ uint_least16_t;
+typedef __UINT_LEAST32_TYPE__ uint_least32_t;
+typedef __UINT_LEAST64_TYPE__ uint_least64_t;
+
+typedef __INT_FAST8_TYPE__ int_fast8_t;
+typedef __INT_FAST16_TYPE__ int_fast16_t;
+typedef __INT_FAST32_TYPE__ int_fast32_t;
+typedef __INT_FAST64_TYPE__ int_fast64_t;
+
+typedef __UINT_FAST8_TYPE__ uint_fast8_t;
+typedef __UINT_FAST16_TYPE__ uint_fast16_t;
+typedef __UINT_FAST32_TYPE__ uint_fast32_t;
+typedef __UINT_FAST64_TYPE__ uint_fast64_t;
+
+typedef __INTPTR_TYPE__ intptr_t;
+typedef __UINTPTR_TYPE__ uintptr_t;
+
+// FIXME: is this the correct?
+typedef int64_t intmax_t;
+typedef uint64_t uintmax_t;
+
+#define INT8_MIN (-INT8_MAX - 1)
+#define INT16_MIN (-INT16_MAX - 1)
+#define INT32_MIN (-INT32_MAX - 1)
+#define INT64_MIN (-INT64_MAX - 1)
+
+#define INT8_MAX __INT8_MAX__
+#define INT16_MAX __INT16_MAX__
+#define INT32_MAX __INT32_MAX__
+#define INT64_MAX __INT64_MAX__
+
+#define UINT8_MAX __UINT8_MAX__
+#define UINT16_MAX __UINT16_MAX__
+#define UINT32_MAX __UINT32_MAX__
+#define UINT64_MAX __UINT64_MAX__
+
+#define INT_LEAST8_MIN (-INT_LEAST8_MAX - 1)
+#define INT_LEAST16_MIN (-INT_LEAST16_MAX - 1)
+#define INT_LEAST32_MIN (-INT_LEAST32_MAX - 1)
+#define INT_LEAST64_MIN (-INT_LEAST64_MAX - 1)
+
+#define INT_LEAST8_MAX __INT_LEAST8_MAX__
+#define INT_LEAST16_MAX __INT_LEAST16_MAX__
+#define INT_LEAST32_MAX __INT_LEAST32_MAX__
+#define INT_LEAST64_MAX __INT_LEAST64_MAX__
+
+#define UINT_LEAST8_MAX __UINT_LEAST8_MAX__
+#define UINT_LEAST16_MAX __UINT_LEAST16_MAX__
+#define UINT_LEAST32_MAX __UINT_LEAST32_MAX__
+#define UINT_LEAST64_MAX __UINT_LEAST64_MAX__
+
+#define INT_FAST8_MIN (-INT_FAST8_MAX - 1)
+#define INT_FAST16_MIN (-INT_FAST16_MAX - 1)
+#define INT_FAST32_MIN (-INT_FAST32_MAX - 1)
+#define INT_FAST64_MIN (-INT_FAST64_MAX - 1)
+
+#define INT_FAST8_MAX __INT_FAST8_MAX__
+#define INT_FAST16_MAX __INT_FAST16_MAX__
+#define INT_FAST32_MAX __INT_FAST32_MAX__
+#define INT_FAST64_MAX __INT_FAST64_MAX__
+
+#define UINT_FAST8_MAX __UINT_FAST8_MAX__
+#define UINT_FAST16_MAX __UINT_FAST16_MAX__
+#define UINT_FAST32_MAX __UINT_FAST32_MAX__
+#define UINT_FAST64_MAX __UINT_FAST64_MAX__
+
+#define INTPTR_MIN (-INTPTR_MAX - 1)
+#define INTPTR_MAX __INTPTR_MAX__
+#define UINTPTR_MAX __UINTPTR_MAX__
+
+// FIXME: is this the correct?
+#define INTMAX_MIN INT64_MIN
+#define INTMAX_MAX INT64_MAX
+#define UINTMAX_MAX UINT64_MAX
+
+#define PTRDIFF_MIN -65535
+#define PTRDIFF_MAX +65535
+
+#define SIG_ATOMIC_MIN __SIG_ATOMIC_MIN__
+#define SIG_ATOMIC_MAX __SIG_ATOMIC_MAX__
+
+#define SIZE_MAX __SIZE_MAX__
+
+#define WCHAR_MIN __WCHAR_MIN__
+#define WCHAR_MAX __WCHAR_MAX__
+
+#define WINT_MIN __WINT_MIN__
+#define WINT_MAX __WINT_MAX__
+
+__END_DECLS
+
+#endif