identiy helper for arrays (matrix/quaternion)

this helpers makes all array elements identity

src/mat4.c

@@ -26,6 +26,12 @@ glmc_mat4_identity(mat4 mat) {
   glm_mat4_identity(mat);
 }
 
+CGLM_EXPORT
+void
+glmc_mat4_identity_array(mat4 * __restrict mat, size_t count) {
+  glm_mat4_identity_array(mat, count);
+}
+
 CGLM_EXPORT
 void
 glmc_mat4_pick3(mat4 mat, mat3 dest) {