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/js_tuz_on_fan.py

@@ -0,0 +1,30 @@
+# Send colours compressed by the JS encoder (tuz.js) and check the fan confirms them.
+import os, subprocess, sys, time
+TOOLS = os.path.join(os.path.dirname(os.path.abspath(__file__)), "..")
+sys.path.insert(0, TOOLS)
+import lianli_poc as p
+
+def js_tinyuz(raw):
+    js = "const {tuzCompress}=require(process.argv[1]);process.stdout.write(Buffer.from(tuzCompress([...Buffer.from(process.argv[2],'hex')])))"
+    return subprocess.run(["node", "-e", js, TOOLS + "/tuz.js", raw.hex()], capture_output=True, check=True).stdout
+
+p.tinyuz = js_tinyuz
+tx, rx = p.Dongle(p.TX_ID, "TX"), p.Dongle(p.RX_ID, "RX")
+try:
+    master, ch, _ = p.find_master(tx)
+    dev = [d for d in p.get_devices(rx) if d["master"] == master][0]
+    # gradient frame exercises dict matches and literals, then back to purple
+    grad = [(i * 5, 0, 255 - i * 5) for i in range(44)]
+    for name, colors in [("gradient", grad), ("purple", [(128, 0, 255)] * 44)]:
+        up = p.build_upload(colors)
+        # reuse set_color's send path with a custom frame
+        n = (len(up["compressed"]) + p.CHUNK_BYTES - 1) // p.CHUNK_BYTES + 1
+        for i in range(n):
+            pkt = p.rgb_packet(up, dev["mac"], master, i)
+            for _ in range(2 if i == 0 else 1):
+                p.send_rf(tx, ch, dev["rx"], pkt); time.sleep(0.002)
+        ok = p.wait_for_effect(rx, dev["mac"], up["effect"])
+        print(name, len(up["compressed"]), "bytes", "confirmed" if ok else "NOT confirmed")
+        time.sleep(3)
+finally:
+    tx.close(); rx.close()