Merge geiger from https://github.com/nmrr/flipperzero-geigercounter

geiger/flipper_geiger.c

@@ -147,7 +147,7 @@ static void draw_callback(Canvas* canvas, void* ctx) {
     } else {
         canvas_set_font(canvas, FontPrimary);
         canvas_draw_str_aligned(canvas, 64, 10, AlignCenter, AlignBottom, "Geiger Counter");
-        canvas_draw_str_aligned(canvas, 64, 20, AlignCenter, AlignBottom, "Version 20230806");
+        canvas_draw_str_aligned(canvas, 64, 20, AlignCenter, AlignBottom, "Version 20240222");
         canvas_draw_str_aligned(canvas, 64, 40, AlignCenter, AlignBottom, "github.com/nmrr");
     }
 }
@@ -215,6 +215,7 @@ int32_t flipper_geiger_app() {
     view_port_input_callback_set(view_port, input_callback, event_queue);
 
     furi_hal_gpio_add_int_callback(&gpio_ext_pa7, gpiocallback, event_queue);
+    furi_hal_gpio_enable_int_callback(&gpio_ext_pa7);
 
     Gui* gui = furi_record_open(RECORD_GUI);
     gui_add_view_port(gui, view_port, GuiLayerFullscreen);