chore(examples): rename live_trading examples to live_binance (#301)

The examples stream a live Binance feed into the indicators and print signals;
they place no orders, so 'live_trading' overstated them and was inconsistent
with the C/Go/R examples already named live_binance. Rename the Python/Node/WASM
files to live_binance.* and update every reference, run command, header, and the
project-tree listings. Accurate use-case wording ('suitable for live trading
bots') and the risk disclaimers are left unchanged.

examples/c/live_binance.c

@@ -1,7 +1,7 @@
 /* Live BTCUSDT indicator with the Wickra C ABI.
  *
  * The C counterpart of `examples/rust/src/bin/live_binance.rs`,
- * `examples/python/live_trading.py` and `examples/node/live_trading.js`. Those
+ * `examples/python/live_binance.py` and `examples/node/live_binance.js`. Those
  * stream Binance over a WebSocket; the C ABI ships only the indicators and no
  * socket layer, so this example polls the Binance REST klines endpoint via the
  * system `curl` once per interval and feeds each newly *closed* candle into a