Refactor cmake (#721)

* some start of refactor

* Update SetFlags.cmake

* Update SetCmakeVar.cmake

* Update SetFlags.cmake

* Fix error int-convertion

* more refactor

* clean up include and source file

* fix link of lib

* fix a warning

* fix include in src/actors

* fix include in src/debug

* fix include in src/ending

* fix include in src/engine/actors

* fix include in src/engine/cameras

* fix include in src/engine/editor

* fix include in src/engine/objects

* fix include in src/engine/tracks

* fix include in src/port/ui

* fix include in src/racing

* fix include in src/engine/vehicles

* fix include in subfolder of src/engine

* fix include in src/engine

* fix include in src/enhancements

* fix include in src

* fix switch

* invert common and findlib

* Update SetFlags.cmake

* clean up some workflow

* some splification

* Update build.sh

* Update Game.h

* add header back

* Delete test_check.cmake

* continue

* Update common.cmake

src/engine/tracks/DKJungle.cpp

@@ -4,7 +4,7 @@
 #include <memory>
 
 #include "DKJungle.h"
-#include "World.h"
+#include "engine/World.h"
 #include "engine/actors/Finishline.h"
 #include "engine/objects/BombKart.h"
 #include "assets/models/tracks/dks_jungle_parkway/dks_jungle_parkway_data.h"
@@ -19,20 +19,20 @@ extern "C" {
     #include "camera.h"
     #include "course_offsets.h"
     #include "code_800029B0.h"
-    #include "render_courses.h"
+    #include "racing/render_courses.h"
     #include "code_8006E9C0.h"
     #include "code_80057C60.h"
     #include "defines.h"
-    #include "math_util.h"
-    #include "external.h"
+    #include "racing/math_util.h"
+    #include "audio/external.h"
     #include "code_80005FD0.h"
     #include "spawn_players.h"
     #include "render_objects.h"
     #include "assets/models/common_data.h"
     #include "save.h"
     #include "replays.h"
-    #include "actors.h"
-    #include "collision.h"
+    #include "racing/actors.h"
+    #include "racing/collision.h"
     #include "code_8003DC40.h"
     #include "memory.h"
     #include "sounds.h"