Reorganized core/ directory, it was too fatty already

-Removed FuncRef, since Callable makes it obsolete
-Removed int_types.h as its obsolete in c++11+
-Changed color names code

modules/lightmapper_rd/lightmapper_rd.cpp

@@ -29,8 +29,8 @@
 /*************************************************************************/
 
 #include "lightmapper_rd.h"
+#include "core/config/project_settings.h"
 #include "core/math/geometry_2d.h"
-#include "core/project_settings.h"
 #include "lm_blendseams.glsl.gen.h"
 #include "lm_compute.glsl.gen.h"
 #include "lm_raster.glsl.gen.h"

modules/lightmapper_rd/lightmapper_rd.h

@@ -31,7 +31,7 @@
 #ifndef LIGHTMAPPER_RD_H
 #define LIGHTMAPPER_RD_H
 
-#include "core/local_vector.h"
+#include "core/templates/local_vector.h"
 #include "scene/3d/lightmapper.h"
 #include "scene/resources/mesh.h"
 #include "servers/rendering/rendering_device.h"

modules/lightmapper_rd/register_types.cpp

@@ -30,7 +30,7 @@
 
 #include "register_types.h"
 
-#include "core/project_settings.h"
+#include "core/config/project_settings.h"
 #include "lightmapper_rd.h"
 #include "scene/3d/lightmapper.h"