FL-186 Add vibro demo (#234)

* add vibro demo
* add F2 support

applications/examples/vibro.c

@@ -0,0 +1,34 @@
+#include "flipper_v2.h"
+
+typedef struct {
+    GpioPin* led;
+    GpioPin* vibro;
+} Ctx;
+
+static void button_handler(const void* value, void* _ctx) {
+    const InputEvent* event = value;
+    Ctx* ctx = (Ctx*)_ctx;
+
+    if(event->input == InputOk) {
+        gpio_write(ctx->vibro, event->state);
+        gpio_write(ctx->led, !event->state);
+    }
+}
+
+void application_vibro(void* p) {
+    Ctx ctx = {.led = (GpioPin*)&led_gpio[1], .vibro = (GpioPin*)&vibro_gpio};
+
+    gpio_init(ctx.led, GpioModeOutputOpenDrain);
+    gpio_init(ctx.vibro, GpioModeOutputPushPull);
+    gpio_write(ctx.led, true);
+    gpio_write(ctx.vibro, false);
+
+    // subscribe on buttons
+    PubSub* event_record = furi_open("input_events");
+    furi_check(event_record);
+    subscribe_pubsub(event_record, button_handler, &ctx);
+
+    while(1) {
+        osDelay(osWaitForever);
+    }
+}