chore: massive repo reorganization

mux/python/README.md

@@ -0,0 +1,26 @@
+# DongLoRa Mux (Python)
+
+USB multiplexer daemon — lets multiple applications share one DongLoRa
+dongle simultaneously.
+
+## What It Does
+
+- Owns the USB serial connection exclusively
+- Exposes a Unix domain socket (and optional TCP) speaking the same
+  COBS-framed protocol
+- RxPacket frames broadcast to all connected clients
+- StartRx/StopRx reference-counted across clients
+- SetConfig locked once set (single client can change freely)
+
+## Running
+
+```sh
+just run                            # start the mux daemon
+just verbose                        # start with verbose logging
+just run --tcp 5741 --port /dev/ttyACM0   # with options
+```
+
+## Depends On
+
+- [clients/python](../../clients/python/) — the `donglora` client library
+  (protocol encoding, device discovery)