Asset packs in FAPs + cleanup unused icons

applications/external/esp32cam_morseflasher/application.fam

@@ -7,7 +7,6 @@ App(
     requires=["gui"],
     stack_size=1 * 1024,
     order=90,
-    fap_icon_assets="assets",
     fap_icon="icon.png",
     fap_category="GPIO",
     fap_description="ESP32-CAM app to stream a message in morse using the powerful flashlight. [Unplug the USB cable to test with Mayhem]",

applications/external/esp32cam_morseflasher/uart_text_input.c

@@ -1,6 +1,6 @@
 #include "uart_text_input.h"
 #include <gui/elements.h>
-#include "mayhem_morseflash_icons.h"
+#include "assets_icons.h"
 #include <furi.h>
 
 struct UART_TextInput {