Add classes for button timing variables and point

button_timing.h

@@ -0,0 +1,5 @@
+#pragma once
+
+static const uint8_t DEBOUNCE_DELAY_MS = 50;
+static const uint16_t LONG_PRESS_TIME_MS = 3000;
+static const uint8_t LONG_PRESS_POLL_TIME_MS = 10;

point.h

@@ -0,0 +1,8 @@
+#pragma once
+
+#include <stdint.h>
+
+struct Point {
+  int16_t x;
+  int16_t y;
+};