Delete lua + Use OpenGL for MPV

Deletes no longer needed Lua stuff -> also repair mpv because of mixed linking of lua (static and dynamic)

Also use OpenGL to embed mpv in the window (some problems on wayland because we have no wid...)

src/UI/DocumentViews/MpvContainer.cc

@@ -42,6 +42,7 @@ MpvContainer::initializeMpv()
     mpv_set_option_string(mpv, "no-ytdl", "yes");
     mpv_request_log_messages(mpv, "info");
     mpv_observe_property(mpv, 0, "pause", MPV_FORMAT_FLAG);
+    mpv_observe_property(mpv, 0, "unpause", MPV_FORMAT_FLAG);
     mpv_observe_property(mpv, 0, "duration", MPV_FORMAT_DOUBLE);
     mpv_observe_property(mpv, 0, "time-pos", MPV_FORMAT_DOUBLE);
 
@@ -143,18 +144,12 @@ MpvContainer::handleMpvEvent(const mpv_event *const event) noexcept
             logDebug() << "MPV -> set to" << (isPlaybackPaused ? "pause" : "play");
         }
 
-        break;
-
-    case MPV_EVENT_PAUSE:
-        isPlaybackPaused = true;
-        emit mpvPlaybackToggled(!isPlaybackPaused);
-        logDebug() << "MPV -> set to pause";
-        break;
+        else if (checkProp(prop, "unpause", MPV_FORMAT_FLAG)) {
+            isPlaybackPaused = !*reinterpret_cast<bool *>(prop->data);
+            emit mpvPlaybackToggled(!isPlaybackPaused);
+            logDebug() << "MPV -> set to" << (isPlaybackPaused ? "pause" : "play");
+        }
 
-    case MPV_EVENT_UNPAUSE:
-        isPlaybackPaused = false;
-        emit mpvPlaybackToggled(!isPlaybackPaused);
-        logDebug() << "MPV -> set to play";
         break;
 
     case MPV_EVENT_START_FILE: logDebug() << "MPV: Begin of file"; break;
@@ -171,17 +166,12 @@ MpvContainer::handleMpvEvent(const mpv_event *const event) noexcept
     case MPV_EVENT_GET_PROPERTY_REPLY:
     case MPV_EVENT_SET_PROPERTY_REPLY:
     case MPV_EVENT_FILE_LOADED:
-    case MPV_EVENT_TRACKS_CHANGED:
-    case MPV_EVENT_TRACK_SWITCHED:
     case MPV_EVENT_IDLE:
     case MPV_EVENT_TICK:
-    case MPV_EVENT_SCRIPT_INPUT_DISPATCH:
     case MPV_EVENT_CLIENT_MESSAGE:
     case MPV_EVENT_AUDIO_RECONFIG:
-    case MPV_EVENT_METADATA_UPDATE:
     case MPV_EVENT_SEEK:
     case MPV_EVENT_PLAYBACK_RESTART:
-    case MPV_EVENT_CHAPTER_CHANGE:
     case MPV_EVENT_QUEUE_OVERFLOW:
     case MPV_EVENT_HOOK: break;
     }