Add Pico presets engine, patterns, and tests.

Wire the Pico to UART-driven preset selection, add pattern modules and presets data, remove old p2p/settings code, and update tests and LED driver.

Made-with: Cursor

pico/src/patterns/calibration.py

@@ -0,0 +1,38 @@
+"""Calibration: strips 2 and 6 only. First 10 green, then alternating 10 blue / 10 red. 10% brightness."""
+
+BRIGHTNESS = 0.10
+BLOCK = 10
+STRIPS_ON = (2, 6)  # 0-based: 3rd and 7th strip only
+
+GREEN = (0, 255, 0)
+RED = (255, 0, 0)
+BLUE = (0, 0, 255)
+
+
+def _scale(color, factor):
+    return tuple(int(c * factor) for c in color)
+
+
+class Calibration:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def run(self, preset):
+        strips = self.driver.strips
+        green = _scale(GREEN, BRIGHTNESS)
+        red = _scale(RED, BRIGHTNESS)
+        blue = _scale(BLUE, BRIGHTNESS)
+        on_set = set(STRIPS_ON)
+        for strip_idx, strip in enumerate(strips):
+            n = strip.num_leds
+            if strip_idx not in on_set:
+                strip.fill((0, 0, 0))
+                strip.show()
+                continue
+            for i in range(n):
+                if i < BLOCK:
+                    strip.set(i, green)
+                else:
+                    block = (i - BLOCK) // BLOCK
+                    strip.set(i, blue if block % 2 == 0 else red)
+            strip.show()