docs: fix package names and stale paths

- client-py is `donglora` on PyPI (not `donglora-python`)
- mux-py is `donglora-mux` on PyPI
- Fix client library links (clients/python → client-py, clients/rust → client-rs)

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

CONTRIBUTING.md

@@ -22,7 +22,7 @@ common tasks consume. No shared board code — each board is self-contained.
 
 ## Client Libraries
 
-Client libraries exist in [Python](clients/python/) and [Rust](clients/rust/).
+Client libraries exist in [Python](https://github.com/donglora/client-py) and [Rust](https://github.com/donglora/client-rs).
 To add a library in another language:
 
 1. Create a directory with the language's standard project layout

profile/README.md

@@ -60,9 +60,9 @@ Some concrete examples:
 |------|-----------|
 | [firmware](https://github.com/donglora/firmware) | Embedded firmware for LoRa boards (Rust) |
 | [client-rs](https://github.com/donglora/client-rs) | Rust client library — `donglora-client` on crates.io |
-| [client-py](https://github.com/donglora/client-py) | Python client library — `donglora-python` on PyPI |
+| [client-py](https://github.com/donglora/client-py) | Python client library — `donglora` on PyPI |
 | [mux-rs](https://github.com/donglora/mux-rs) | USB multiplexer daemon (Rust) |
-| [mux-py](https://github.com/donglora/mux-py) | USB multiplexer daemon (Python) |
+| [mux-py](https://github.com/donglora/mux-py) | USB multiplexer daemon — `donglora-mux` on PyPI |
 | [bridge](https://github.com/donglora/bridge) | P2P LoRa bridge — relays packets across the internet via encrypted gossip (Rust) |
 | [examples](https://github.com/donglora/examples) | Ready-to-run scripts — receive, transmit, ping-pong, bridge (Python) |
 | [ai-bot](https://github.com/donglora/ai-bot) | MeshCore AI chatbot — default mesh name "Orac" (Python) |