docs+ci: surface 10-language golden verification (#303)

* docs+ci: surface 10-language golden verification; add WASM golden CI

- README: add C++ to the Quickstart list and state prominently that all 514
  indicators are replayed through all 10 languages and checked bit-for-bit
  against the Rust reference.
- CHANGELOG: document the cross-language golden suite, the Java and R C-ABI
  bool-marshalling fixes, the C# nullable directive and the live_binance rename.
- ci.yml: run the WASM golden suite (nodejs-target build + node --test); the
  C/C++ golden tests already run via the C-ABI job's ctest and the other
  bindings pick up their golden runners in their existing test suites.

* readme: add verified badge + prominent per-language throughput table

- Add the 'verified across 10 languages' badge to the badge row, linking to
  the FAQ that explains the cross-language golden parity.
- Surface a per-binding throughput table (the cost of each language's FFI
  boundary) so readers can pick a binding that keeps up with streaming hot
  loops — the cross-library benchmarks stay in BENCHMARKS.md.

* changelog: note the verified badge and per-binding throughput table

* docs: fix cross-language consistency (audit)

- docs/README.md: add the missing C++ quickstart link.
- README testing section: the golden parity now covers all 10 languages and
  all 514 indicators (was 'four C-ABI bindings, 7 archetype indicators').
- CHANGELOG: the live_binance rename also covers the C examples.

docs/README.md

@@ -9,6 +9,7 @@ That includes:
   [Node](https://docs.wickra.org/Quickstart-Node),
   [WASM](https://docs.wickra.org/Quickstart-WASM),
   [C](https://docs.wickra.org/Quickstart-C),
+  [C++](https://docs.wickra.org/Quickstart-C),
   [C#](https://docs.wickra.org/Quickstart-CSharp),
   [Go](https://docs.wickra.org/Quickstart-Go),
   [Java](https://docs.wickra.org/Quickstart-Java), and