led blink example

* led blink example

* restore tests

* Update FURI_and_examples.md

applications/examples/blink.c

@@ -0,0 +1,16 @@
+#include "flipper.h"
+
+void application_blink(void* p) {
+    // create pin
+    GpioPin led = {.pin = GPIO_PIN_8, .port = GPIOA};
+    
+    // configure pin
+    pinMode(led, GpioModeOutput);
+
+    while(1) {
+        digitalWrite(led, HIGH);
+        delay(500);
+        digitalWrite(led, LOW);
+        delay(500);
+    }
+}