Added the Blinker library to the root of Passkey and fixed some include directive to be more native

Blinker.cpp

@@ -0,0 +1,44 @@
+#include <Blinker.h>
+
+Blinker::Blinker(int pin) {
+    _blinkPin = pin;
+    _highDelay = 500;
+    _lowDelay = 500;
+    _lastBlink = 0;
+    _blinkState = false;
+    _running = false;
+}
+
+void Blinker::setDelay(uint32_t d) {
+    _highDelay = d;
+    _lowDelay = d;
+}
+
+void Blinker::setDelay(uint32_t h, uint32_t l) {
+    _highDelay = h;
+    _lowDelay = l;
+}
+
+void Blinker::blink() {
+    uint32_t diff = millis() - _lastBlink;
+    uint32_t blinkDelay = _blinkState ? _highDelay : _lowDelay;
+    if (diff >= blinkDelay) {
+        _lastBlink = millis() - (diff - blinkDelay); // Account for any delay in calling blink
+        _blinkState = !_blinkState;
+        if (_running) {
+            digitalWrite(_blinkPin, _blinkState ? HIGH : LOW);
+        }
+    }
+}
+
+void Blinker::start() {
+    pinMode(_blinkPin, OUTPUT);
+    _running = true;
+    _lastBlink = millis();
+}
+
+void Blinker::stop(bool idleState) {
+    _running = false;
+    _blinkState = idleState;
+    digitalWrite(_blinkPin, _blinkState);
+}