Rename patterns module to presets

Rename the driver module and update imports so tests and main entry use the new presets naming, while moving Preset to its own file.

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

test/patterns/on.py

@@ -2,7 +2,7 @@
 import utime
 from machine import WDT
 from settings import Settings
-from patterns import Patterns
+from presets import Presets
 
 
 def main():
@@ -10,17 +10,19 @@ def main():
     pin = s.get("led_pin", 10)
     num = s.get("num_leds", 30)
 
-    p = Patterns(pin=pin, num_leds=num)
+    p = Presets(pin=pin, num_leds=num)
     wdt = WDT(timeout=10000)
     
-    # Create presets for on and off
+    # Create presets for on and off using the short-key fields that Presets expects
+    # Preset fields:
+    #   p = pattern name, b = brightness, d = delay, c = list of (r,g,b) colors
     p.edit("test_on", {
-        "pattern": "on",
-        "brightness": 64,
-        "delay": 120,
-        "colors": [(255, 0, 0), (0, 0, 255)]
+        "p": "on",
+        "b": 64,
+        "d": 120,
+        "c": [(255, 0, 0), (0, 0, 255)],
     })
-    p.edit("test_off", {"pattern": "off"})
+    p.edit("test_off", {"p": "off"})
 
     # ON phase
     p.select("test_on")