feat(patterns): add colour cycle, flicker, and flame

Made-with: Cursor

src/patterns/__init__.py

@@ -1,6 +1,5 @@
-from .blink import Blink
-from .rainbow import Rainbow
-from .pulse import Pulse
-from .transition import Transition
-from .chase import Chase
-from .circle import Circle
+"""Pattern modules are registered only via Presets._load_dynamic_patterns().
+
+This file is ignored as a pattern (see presets.py). Keep it free of imports so
+adding a pattern does not require editing this package.
+"""