Remove FAPP and fix main menu

applications/main/xtreme_app/application.fam

@@ -1,14 +1,12 @@
 App(
     appid="xtreme_app",
     name="Xtreme",
-    apptype=FlipperAppType.FAPP,
+    apptype=FlipperAppType.MENUEXTERNAL,
     entry_point="xtreme_app",
-    cdefines=["APP_XTREME"],
-    requires=[
-        "gui",
-        "dolphin",
-    ],
     stack_size=2 * 1024,
     icon="A_Xtreme_14",
     order=90,
+    fap_libs=["assets"],
+    # fap_icon="",
+    # fap_category="",
 )