Add multi-panel Pico UDP firmware and Python LED control.

Pico panels get static IPs on 10.1.1.10–14 with per-panel LED counts, Makefile deploy targets, and Python examples for animations, sync tests, and direct Pi SPI control.

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

examples/panel_rgb_cycle.py

@@ -0,0 +1,44 @@
+#!/usr/bin/env python3
+"""Cycle full-panel red / green / blue on Pico panel(s)."""
+
+from __future__ import annotations
+
+import argparse
+import sys
+import time
+
+from leds.panel_udp import PanelClient, add_panel_args, format_panel_targets, panel_targets_from_args
+
+COLORS = (
+    ("RED", (255, 0, 0)),
+    ("GREEN", (0, 255, 0)),
+    ("BLUE", (0, 0, 255)),
+)
+
+
+def main() -> int:
+    parser = argparse.ArgumentParser(description="RGB cycle on Pico panel(s)")
+    add_panel_args(parser)
+    parser.add_argument("--pause", type=float, default=1.0)
+    args = parser.parse_args()
+
+    targets = panel_targets_from_args(args)
+    print(f"RGB cycle -> {format_panel_targets(targets, args.port)} (Ctrl+C to stop)")
+
+    try:
+        with PanelClient.from_args(args) as client:
+            while True:
+                for label, color in COLORS:
+                    print(f"  {label}")
+                    client.fill(color)
+                    time.sleep(args.pause)
+    except KeyboardInterrupt:
+        print("\nStopped.")
+    except OSError as exc:
+        print(f"Network error: {exc}", file=sys.stderr)
+        return 1
+    return 0
+
+
+if __name__ == "__main__":
+    raise SystemExit(main())