Install Linux appdata and new desktop file

CMakeModules/InstallLinuxDesktopFile.cmake

@@ -1,2 +1,3 @@
-install (FILES ${CMAKE_SOURCE_DIR}/resources/desktop/jellyfinmediaplayer.desktop DESTINATION ${CMAKE_INSTALL_FULL_DATAROOTDIR}/applications)
+install (FILES ${CMAKE_SOURCE_DIR}/resources/meta/com.github.iwalton3.jellyfin-media-player.desktop DESTINATION ${CMAKE_INSTALL_FULL_DATAROOTDIR}/applications)
+install (FILES ${CMAKE_SOURCE_DIR}/resources/meta/com.github.iwalton3.jellyfin-media-player.appdata.xml DESTINATION ${CMAKE_INSTALL_FULL_DATAROOTDIR}/metainfo)
 install (FILES ${CMAKE_SOURCE_DIR}/resources/images/icon.svg DESTINATION ${CMAKE_INSTALL_FULL_DATAROOTDIR}/icons/hicolor/scalable/apps RENAME plexmediaplayer.svg)