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/tar.h

@@ -0,0 +1,40 @@
+#ifndef _TAR_H
+#define _TAR_H 1
+
+// https://pubs.opengroup.org/onlinepubs/9699919799/basedefs/tar.h.html
+
+#include <sys/cdefs.h>
+
+__BEGIN_DECLS
+
+#define TMAGIC		"ustar"
+#define TMAGLEN		6
+#define TVERSION	"00"
+#define TVERSLEN	2
+
+#define REGTYPE		'0'
+#define AREGTYPE	'\0'
+#define LNKTYPE		'1'
+#define SYMTYPE		'2'
+#define CHRTYPE		'3'
+#define BLKTYPE		'4'
+#define DIRTYPE		'5'
+#define FIFOTYPE	'6'
+#define CONTTYPE	'7'
+
+#define TSUID	04000
+#define TSGID	02000
+#define TSVTX	01000
+#define TUREAD	00400
+#define TUWRITE	00200
+#define TUEXEC	00100
+#define TGREAD	00040
+#define TGWRITE	00020
+#define TGEXEC	00010
+#define TOREAD	00004
+#define TOWRITE	00002
+#define TOEXEC	00001
+
+__END_DECLS
+
+#endif