Add LIN_to_IR environment, correct SWM key mappings, and organize Arduino project files

Arduino/Blink_Test/Blink_Test.cpp

@@ -0,0 +1,12 @@
+#include <Arduino.h>
+
+void setup() {
+  pinMode(3, OUTPUT);
+}
+
+void loop() {
+  digitalWrite(3, HIGH);
+  delay(500);
+  digitalWrite(3, LOW);
+  delay(500);
+}