clipspace: add initial implementations LH, RH and NO, ZO

Add the initial implementations of the left-handed and right-handed
coordinate systems as well as clipspace depth values of [-1, 0] and
[0, 1].

test/include/common.h

@@ -20,6 +20,10 @@
 #  define _GNU_SOURCE /* for drand48() */
 #endif
 
+#ifndef CGLM_CLIPSPACE_INCLUDE_ALL
+#  define CGLM_CLIPSPACE_INCLUDE_ALL
+#endif
+
 #include <stdlib.h>
 #include <stdio.h>
 #include <string.h>