Add Lian Li SL-INF wireless tools and SignalRGB plugin

Proof-of-concept tools for the UNI FAN SL-INF Wireless kit (SLV3 TX/RX
dongles 0416:8040/8041): a Python scan/colour script, tinyuz helpers, a
JavaScript tinyuz encoder, the SignalRGB plugin and tests.

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>

test/watch_rx.py

@@ -0,0 +1,19 @@
+# Watch the fan's effect id via the RX dongle only (TX stays free for SignalRGB).
+import os, sys, time
+TOOLS = os.path.join(os.path.dirname(os.path.abspath(__file__)), "..")
+sys.path.insert(0, TOOLS)
+import lianli_poc as p
+rx = p.Dongle(p.RX_ID, "RX")
+try:
+    seen = []
+    end = time.time() + (float(sys.argv[1]) if len(sys.argv) > 1 else 10)
+    while time.time() < end:
+        for d in p.get_devices(rx):
+            e = d["effect"].hex()
+            if not seen or seen[-1] != e:
+                seen.append(e)
+                print(f"{time.strftime('%H:%M:%S')} effect {e}")
+        time.sleep(0.2)
+    print(f"{len(seen)} distinct effect ids")
+finally:
+    rx.close()