feat(patterns): add expanded animation pack with smoke tests

Add a broad set of new pattern modules and matching pattern smoke scripts so the new effects can be validated directly on-device.

src/patterns/plasma.py

@@ -0,0 +1,39 @@
+import utime
+
+
+class Plasma:
+    def __init__(self, driver):
+        self.driver = driver
+
+    def _wheel(self, pos):
+        if pos < 85:
+            return (pos * 3, 255 - pos * 3, 0)
+        if pos < 170:
+            pos -= 85
+            return (255 - pos * 3, 0, pos * 3)
+        pos -= 170
+        return (0, pos * 3, 255 - pos * 3)
+
+    def run(self, preset):
+        scale = max(1, int(preset.n1) if int(preset.n1) > 0 else 6)
+        speed = max(1, int(preset.n2) if int(preset.n2) > 0 else 2)
+        contrast = max(1, int(preset.n3) if int(preset.n3) > 0 else 2)
+        t = self.driver.step % 256
+        last = utime.ticks_ms()
+        while True:
+            d = max(1, int(preset.d))
+            now = utime.ticks_ms()
+            if utime.ticks_diff(now, last) >= d:
+                for i in range(self.driver.num_leds):
+                    v = ((i * scale + t) & 255)
+                    v2 = (((i * scale // max(1, contrast)) - (t * 2)) & 255)
+                    c = self._wheel((v + v2) & 255)
+                    self.driver.n[i] = self.driver.apply_brightness(c, preset.b)
+                self.driver.n.write()
+                t = (t + speed) % 256
+                self.driver.step = t
+                last = utime.ticks_add(last, d)
+                if not preset.a:
+                    yield
+                    return
+            yield