add flac support and files management app

main/CMakeLists.txt

@@ -6,6 +6,7 @@ idf_component_register(
         "APP/ui_common.c"
         "APP/lvgl_port.c"
         "APP/home/ui_home.c"
+        "APP/files/ui_files.c"
         "APP/player/ui_player.c"
         "APP/player/player.c"
         "APP/player/audio_source.c"
@@ -14,6 +15,7 @@ idf_component_register(
         "."
         "APP"
         "APP/home"
+        "APP/files"
         "APP/player"
     REQUIRES
         BSP