Initial commit — Amirine Cosplay Lights

Arduino Uno + WS2812B LED strip controller with a text-based lightshow
system. Shows are defined as .txt files (hex color + fade duration per step),
converted to PROGMEM headers by convert_all.py, and navigated at runtime
via a debounced button (tap/double-tap/hold). BSD 2-Clause license.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

arduino/cosplay_lights/led_controller.h

@@ -0,0 +1,14 @@
+// SPDX-License-Identifier: BSD-2-Clause
+#pragma once
+#include <FastLED.h>
+#include "config.h"
+
+// Initialize the LED strip. Call once in setup().
+void leds_begin();
+
+// Apply 'color' to all LEDs using the pattern defined in config.h (ACTIVE_PATTERN).
+// Call leds_show() afterwards to push the update to the physical strip.
+void leds_apply_color(CRGB color);
+
+// Flush the LED buffer to the physical strip. Call once per frame after leds_apply_color().
+void leds_show();