docs(wiki): add Cookbook, TA-Lib migration table and FAQ

Three content gaps in the wiki: there was no migration story for users
porting from TA-Lib, no strategy cookbook, and no FAQ. Add all three as
self-contained pages and link them from Home.md's "Wiki contents".

* docs/wiki/TA-Lib-Migration.md — full one-to-one mapping table from
  every common talib.X(...) call to the equivalent Wickra expression,
  plus a "what Wickra has that TA-Lib does not" / "what TA-Lib has that
  Wickra does not (yet)" delta.
* docs/wiki/Cookbook.md — seven concrete strategy recipes (RSI mean
  reversion, MACD histogram crossover, Bollinger breakout, ADX-gated
  trend, multi-timeframe confirmation, SuperTrend trailing stop,
  Chain<EMA, RSI>) with Rust or Python snippets.
* docs/wiki/FAQ.md — common questions on warmup, NaN handling, thread
  safety, installation, performance and comparing Wickra to TA-Lib /
  pandas-ta / talipp / finta.

Also extend the [Unreleased] CHANGELOG entry that records the
examples/<lang>/ restructure with the wiki additions; Home.md gains
three new bullets under "Wiki contents".

CHANGELOG.md

@@ -66,6 +66,15 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 - The indicator benchmarks (`crates/wickra/benches/indicators.rs`) now run
   against the checked-in real BTCUSDT 1-minute dataset instead of a synthetic
   price series.
+- Every language's examples now live under a uniform `examples/<lang>/`
+  tree: Rust moved into a new `examples/rust/` workspace member crate
+  (`wickra-examples`, run via `cargo run -p wickra-examples --bin <name>`),
+  Node into `examples/node/` with its own `package.json` linking `wickra` via
+  `file:../../bindings/node`, and the WASM browser demo into
+  `examples/wasm/`. The bundled BTCUSDT datasets move alongside them at
+  `examples/data/`. Six new examples close the cross-language parity matrix:
+  streaming demos for Python and Rust; multi-timeframe and parallel-assets
+  demos for both Rust and Node.
 
 ### Fixed
 - `Timeframe::floor` no longer overflows for timestamps near `i64::MIN`.