feat(patterns): add icicles blizzard and rime winter effects

Co-authored-by: Cursor <cursoragent@cursor.com>

tests/patterns/icicles.py

@@ -0,0 +1,43 @@
+#!/usr/bin/env python3
+import utime
+from machine import WDT
+from settings import Settings
+from presets import Presets
+
+
+def run_for(p, wdt, ms):
+    start = utime.ticks_ms()
+    while utime.ticks_diff(utime.ticks_ms(), start) < ms:
+        wdt.feed()
+        p.tick()
+        utime.sleep_ms(10)
+
+
+def main():
+    s = Settings()
+    p = Presets(pin=s.get("led_pin", 10), num_leds=s.get("num_leds", 40))
+    wdt = WDT(timeout=10000)
+
+    p.edit(
+        "test_icicles",
+        {
+            "p": "icicles",
+            "b": 220,
+            "d": 50,
+            "c": [(200, 230, 255), (255, 255, 255)],
+            "n1": 10,
+            "n2": 8,
+            "n3": 1,
+            "a": True,
+        },
+    )
+    p.select("test_icicles")
+    run_for(p, wdt, 2500)
+
+    p.edit("cleanup_off", {"p": "off"})
+    p.select("cleanup_off")
+    run_for(p, wdt, 80)
+
+
+if __name__ == "__main__":
+    main()