Split out detection system from ResourceManager into DetectionManager

* Split detection system out into its own class, DetectionManager
    * Clean up ResourceManger's many callbacks into just two, one for detection and one general purpose

Controllers/EspurnaController/EspurnaControllerDetect.cpp

@@ -9,9 +9,11 @@
 |   SPDX-License-Identifier: GPL-2.0-or-later               |
 \*---------------------------------------------------------*/
 
-#include "Detector.h"
+#include "DetectionManager.h"
 #include "EspurnaController.h"
+#include "ResourceManager.h"
 #include "RGBController_Espurna.h"
+#include "RGBController.h"
 #include "SettingsManager.h"
 
 /******************************************************************************************\
@@ -71,7 +73,7 @@ void DetectEspurnaControllers()
 
             RGBController_Espurna* rgb_controller = new RGBController_Espurna(controller);
 
-            ResourceManager::get()->RegisterRGBController(rgb_controller);
+            DetectionManager::get()->RegisterRGBController(rgb_controller);
         }
     }