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/gdscript/language_server/gdscript_extend_parser.h

@@ -32,7 +32,7 @@
 #define GDSCRIPT_EXTEND_PARSER_H
 
 #include "../gdscript_parser.h"
-#include "core/variant.h"
+#include "core/variant/variant.h"
 #include "lsp.hpp"
 
 #ifndef LINE_NUMBER_TO_INDEX

modules/gdscript/language_server/gdscript_language_protocol.cpp

@@ -30,9 +30,9 @@
 
 #include "gdscript_language_protocol.h"
 
+#include "core/config/project_settings.h"
 #include "core/io/json.h"
 #include "core/os/copymem.h"
-#include "core/project_settings.h"
 #include "editor/editor_log.h"
 #include "editor/editor_node.h"
 

modules/gdscript/language_server/gdscript_text_document.h

@@ -31,8 +31,8 @@
 #ifndef GDSCRIPT_TEXT_DOCUMENT_H
 #define GDSCRIPT_TEXT_DOCUMENT_H
 
+#include "core/object/reference.h"
 #include "core/os/file_access.h"
-#include "core/reference.h"
 #include "lsp.hpp"
 
 class GDScriptTextDocument : public Reference {

modules/gdscript/language_server/gdscript_workspace.cpp

@@ -32,8 +32,8 @@
 
 #include "../gdscript.h"
 #include "../gdscript_parser.h"
-#include "core/project_settings.h"
-#include "core/script_language.h"
+#include "core/config/project_settings.h"
+#include "core/object/script_language.h"
 #include "editor/editor_file_system.h"
 #include "editor/editor_help.h"
 #include "editor/editor_node.h"

modules/gdscript/language_server/gdscript_workspace.h

@@ -32,7 +32,7 @@
 #define GDSCRIPT_WORKSPACE_H
 
 #include "../gdscript_parser.h"
-#include "core/variant.h"
+#include "core/variant/variant.h"
 #include "editor/editor_file_system.h"
 #include "gdscript_extend_parser.h"
 #include "lsp.hpp"

modules/gdscript/language_server/lsp.hpp

@@ -31,8 +31,8 @@
 #ifndef GODOT_LSP_H
 #define GODOT_LSP_H
 
-#include "core/class_db.h"
-#include "core/list.h"
+#include "core/object/class_db.h"
+#include "core/templates/list.h"
 #include "editor/doc_data.h"
 
 namespace lsp {