Add sample program to confirm PIO envs are working

Author: Burke-Daniel

Node/DTS/main.cpp

@@ -1 +1,14 @@
-// This file is intentionally left blank
+#include <Arduino.h>
+
+void setup()
+{
+    pinMode(LED_BUILTIN, OUTPUT);
+}
+
+void loop()
+{
+    digitalWrite(LED_BUILTIN, HIGH);
+    delay(1000);
+    digitalWrite(LED_BUILTIN, LOW);
+    delay(1000);
+}

Node/Examples/example1.cpp

@@ -1 +1,14 @@
-// This file is intentionally left blank
+#include <Arduino.h>
+
+void setup()
+{
+    pinMode(LED_BUILTIN, OUTPUT);
+}
+
+void loop()
+{
+    digitalWrite(LED_BUILTIN, HIGH);
+    delay(1000);
+    digitalWrite(LED_BUILTIN, LOW);
+    delay(1000);
+}

Node/Vacuum/main.cpp

@@ -1 +1,14 @@
-// This file is intentionally left blank
+#include <Arduino.h>
+
+void setup()
+{
+    pinMode(LED_BUILTIN, OUTPUT);
+}
+
+void loop()
+{
+    digitalWrite(LED_BUILTIN, HIGH);
+    delay(1000);
+    digitalWrite(LED_BUILTIN, LOW);
+    delay(1000);
+}

Node/WindTunnel/main.cpp

@@ -1 +1,14 @@
-// This file is intentionally left blank
+#include <Arduino.h>
+
+void setup()
+{
+    pinMode(LED_BUILTIN, OUTPUT);
+}
+
+void loop()
+{
+    digitalWrite(LED_BUILTIN, HIGH);
+    delay(1000);
+    digitalWrite(LED_BUILTIN, LOW);
+    delay(1000);
+}