Merge mayhem_camera from https://github.com/eried/flipperzero-mayhem

mayhem_camera/.gitsubtree

@@ -1 +1 @@
-https://github.com/eried/flipperzero-mayhem next flipper_companion_apps/applications/external/mayhem_camera c400a80d2397543ca5d8160840ed6f2d281aa837
+https://github.com/eried/flipperzero-mayhem next flipper_companion_apps/applications/external/mayhem_camera 4551109e79fd65a0f7530f31d8beb6fdc09118a3

mayhem_camera/camera.c

@@ -44,7 +44,7 @@ void get_timefilename(FuriString* name) {
     furi_hal_rtc_get_datetime(&datetime);
     furi_string_printf(
         name,
-        APP_DATA_PATH("%.4d%.2d%.2d-%.2d%.2d%.2d.bmp"),
+        APP_DATA_PATH("DCIM/%.4d%.2d%.2d-%.2d%.2d%.2d.bmp"),
         datetime.year,
         datetime.month,
         datetime.day,