Merge signal_generator from https://github.com/flipperdevices/flipperzero-good-faps

# Conflicts:
#	signal_generator/signal_gen_app.c

signal_generator/application.fam

@@ -6,7 +6,7 @@ App(
     requires=["gui"],
     stack_size=1 * 1024,
     fap_description="Control GPIO pins to generate digital signals",
-    fap_version="1.0",
+    fap_version="1.1",
     fap_icon="signal_gen_10px.png",
     fap_category="GPIO",
     fap_icon_assets="icons",

signal_generator/signal_gen_app.c

@@ -28,7 +28,6 @@ SignalGenApp* signal_gen_app_alloc() {
 
     app->view_dispatcher = view_dispatcher_alloc();
     app->scene_manager = scene_manager_alloc(&signal_gen_scene_handlers, app);
-
     view_dispatcher_set_event_callback_context(app->view_dispatcher, app);
 
     view_dispatcher_set_custom_event_callback(