move extracting planes to camera header

* since it related to view frustum / camera it should be in thie header or separate header called frustum.h
* update LICENSE to add authors of algorithm

include/cglm/call/cam.h

@@ -48,6 +48,10 @@ glmc_lookat(vec3 eye,
             vec3 up,
             mat4 dest);
 
+CGLM_EXPORT
+void
+glmc_extract_planes(mat4 m, vec4 dest[6]);
+
 #ifdef __cplusplus
 }
 #endif

include/cglm/call/plane.h

@@ -17,10 +17,6 @@ CGLM_EXPORT
 void
 glmc_plane_normalize(vec4 plane);
 
-CGLM_EXPORT
-void
-glmc_plane_extract(mat4 projView, vec4 dest[6]);
-
 #ifdef __cplusplus
 }
 #endif