Change sound backend from Qt to miniaudio (#4334)

Thanks Greenlandicsmiley, Nerixyz, Yoitsu, and helmak for helping debug & test this

* Remove QMediaPlayer includes

* Prefer local path when generating the sound path

* Update changelog entry number

* Disable pitch & spatialization control

src/Application.hpp

@@ -19,6 +19,7 @@ class HighlightController;
 class HotkeyController;
 class IUserDataController;
 class UserDataController;
+class SoundController;
 
 class Theme;
 class WindowManager;
@@ -92,6 +93,7 @@ public:
     FfzBadges *const ffzBadges{};
     SeventvBadges *const seventvBadges{};
     UserDataController *const userData{};
+    SoundController *const sound{};
 
     /*[[deprecated]]*/ Logging *const logging{};