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/locale.h

@@ -0,0 +1,73 @@
+#ifndef _LOCALE_H
+#define _LOCALE_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/locale.h.html
+
+#include <sys/cdefs.h>
+
+#include <bits/types/locale_t.h>
+
+#define __need_NULL
+#include <stddef.h>
+
+#define LC_COLLATE	0
+#define LC_CTYPE	1
+#define LC_MESSAGES	2
+#define LC_MONETARY	3
+#define LC_NUMERIC	4
+#define LC_TIME 	5
+#define LC_ALL		6
+
+#define LC_COLLATE_MASK 	(1 << LC_COLLATE)
+#define LC_CTYPE_MASK		(1 << LC_CTYPE)
+#define LC_MESSAGES_MASK	(1 << LC_MESSAGES)
+#define LC_MONETARY_MASK	(1 << LC_MONETARY)
+#define LC_NUMERIC_MASK		(1 << LC_NUMERIC)
+#define LC_TIME_MASK		(1 << LC_TIME)
+#define LC_ALL_MASK   LC_COLLATE_MASK	\
+					| LC_CTYPE_MASK		\
+					| LC_MESSAGES_MASK	\
+					| LC_MONETARY_MASK	\
+					| LC_NUMERIC_MASK	\
+					| LC_TIME_MASK
+
+__BEGIN_DECLS
+
+struct lconv
+{
+	char*	currency_symbol;
+	char*	decimal_point;
+	char	frac_digits;
+	char*	grouping;
+	char*	int_curr_symbol;
+	char 	int_frac_digits;
+	char 	int_n_cs_precedes;
+	char 	int_n_sep_by_space;
+	char 	int_n_sign_posn;
+	char 	int_p_cs_precedes;
+	char 	int_p_sep_by_space;
+	char 	int_p_sign_posn;
+	char*	mon_decimal_point;
+	char*	mon_grouping;
+	char*	mon_thousands_sep;
+	char*	negative_sign;
+	char 	n_cs_precedes;
+	char 	n_sep_by_space;
+	char 	n_sign_posn;
+	char*	positive_sign;
+	char 	p_cs_precedes;
+	char 	p_sep_by_space;
+	char 	p_sign_posn;
+	char*	thousands_sep;
+};
+
+locale_t		duplocale(locale_t locobj);
+void			freelocale(locale_t locobj);
+struct lconv*	localeconv(void);
+locale_t		newlocale(int category_mask, const char* locale, locale_t base);
+char* 			setlocale(int category, const char* locale);
+locale_t		uselocale(locale_t newloc);
+
+__END_DECLS
+
+#endif