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/KeychronKeyboardController/KeychronKeyboardControllerDetect.cpp

@@ -9,7 +9,7 @@
 |   SPDX-License-Identifier: GPL-2.0-or-later               |
 \*---------------------------------------------------------*/
 
-#include "Detector.h"
+#include "DetectionManager.h"
 #include "KeychronKeyboardController.h"
 #include "RGBController_KeychronKeyboard.h"
 
@@ -32,7 +32,7 @@ void DetectKeychronKeyboardControllers(hid_device_info* info, const std::string&
         KeychronKeyboardController*     controller      = new KeychronKeyboardController(dev, *info, name);
         RGBController_KeychronKeyboard* rgb_controller  = new RGBController_KeychronKeyboard(controller);
 
-        ResourceManager::get()->RegisterRGBController(rgb_controller);
+        DetectionManager::get()->RegisterRGBController(rgb_controller);
     }
 }