chore(migration): switch org to wickra-lib and maintainer email to wickra.lib@gmail.com (#59)

Introduce repo-metadata.toml as single source of truth for repo identity
(org slug, maintainer email, canonical URLs) and add sync-metadata.yml
workflow with a Python audit script that fails CI if any tracked file
drifts back to pre-migration values.

Bulk-replace across 24 tracked files:
- kingchenc/wickra -> wickra-lib/wickra (URL segment)
- kingchencp@gmail.com -> wickra.lib@gmail.com (maintainer email)
- @kingchenc -> @wickra-lib (CODEOWNERS mention only)

Person-name credits are preserved: LICENSE copyright holder, Cargo.toml
authors handle, and CHANGELOG historical @kingchenc reference all remain
unchanged. Crate / PyPI / npm package names also untouched.

Merge this PR only after the kingchenc/wickra -> wickra-lib/wickra org
transfer has happened on the GitHub side, otherwise all badges and
repository links 404 until the transfer is performed.

docs/README.md

@@ -1,30 +1,30 @@
 # Documentation
 
-Wickra's full documentation lives in the **[GitHub Wiki](https://github.com/kingchenc/wickra/wiki)**.
+Wickra's full documentation lives in the **[GitHub Wiki](https://github.com/wickra-lib/wickra/wiki)**.
 
 That includes:
 
-- **Quickstarts** for [Rust](https://github.com/kingchenc/wickra/wiki/Quickstart-Rust.md),
-  [Python](https://github.com/kingchenc/wickra/wiki/Quickstart-Python.md),
-  [Node](https://github.com/kingchenc/wickra/wiki/Quickstart-Node.md), and
-  [WASM](https://github.com/kingchenc/wickra/wiki/Quickstart-WASM.md).
+- **Quickstarts** for [Rust](https://github.com/wickra-lib/wickra/wiki/Quickstart-Rust.md),
+  [Python](https://github.com/wickra-lib/wickra/wiki/Quickstart-Python.md),
+  [Node](https://github.com/wickra-lib/wickra/wiki/Quickstart-Node.md), and
+  [WASM](https://github.com/wickra-lib/wickra/wiki/Quickstart-WASM.md).
 - A per-indicator deep dive for every one of the **214 indicators** across
   the sixteen families (Moving Averages, Momentum Oscillators, Trend &
   Directional, Price Oscillators, Volatility & Bands, Bands & Channels,
   Trailing Stops, Volume, Price Statistics, Ehlers / Cycle DSP, Pivots &
   S/R, DeMark, Ichimoku & Charts, Candlestick Patterns, Market Profile,
   Risk / Performance) — see the
-  [indicators overview](https://github.com/kingchenc/wickra/wiki/Indicators-Overview.md).
-- **Reference pages**: [warmup periods](https://github.com/kingchenc/wickra/wiki/Warmup-Periods.md),
-  [streaming vs batch](https://github.com/kingchenc/wickra/wiki/Streaming-vs-Batch.md),
-  [indicator chaining](https://github.com/kingchenc/wickra/wiki/Indicator-Chaining.md), and the
-  [data layer](https://github.com/kingchenc/wickra/wiki/Data-Layer.md).
-- **Guides**: [Cookbook](https://github.com/kingchenc/wickra/wiki/Cookbook.md),
-  [TA-Lib migration](https://github.com/kingchenc/wickra/wiki/TA-Lib-Migration.md),
-  [FAQ](https://github.com/kingchenc/wickra/wiki/FAQ.md).
+  [indicators overview](https://github.com/wickra-lib/wickra/wiki/Indicators-Overview.md).
+- **Reference pages**: [warmup periods](https://github.com/wickra-lib/wickra/wiki/Warmup-Periods.md),
+  [streaming vs batch](https://github.com/wickra-lib/wickra/wiki/Streaming-vs-Batch.md),
+  [indicator chaining](https://github.com/wickra-lib/wickra/wiki/Indicator-Chaining.md), and the
+  [data layer](https://github.com/wickra-lib/wickra/wiki/Data-Layer.md).
+- **Guides**: [Cookbook](https://github.com/wickra-lib/wickra/wiki/Cookbook.md),
+  [TA-Lib migration](https://github.com/wickra-lib/wickra/wiki/TA-Lib-Migration.md),
+  [FAQ](https://github.com/wickra-lib/wickra/wiki/FAQ.md).
 
 ## Editing the wiki
 
-The wiki is a separate git repository at `https://github.com/kingchenc/wickra.wiki.git`.
+The wiki is a separate git repository at `https://github.com/wickra-lib/wickra.wiki.git`.
 Clone it locally if you want to bulk-edit; otherwise the GitHub web UI's "Edit" button on any
 wiki page is fine for one-off changes.