F13c: restructure the indicator catalogue into eight families

The original taxonomy was four classical families plus a statistics group,
with the F1-F12 expansion slotted in as sub-categories. This regroups the
whole 71-indicator catalogue into eight top-level families, each with at
least five members:

  Moving Averages (12), Momentum Oscillators (13), Trend & Directional (9),
  Price Oscillators (5), Volatility & Bands (12), Trailing Stops (5),
  Volume (9), Price Statistics (7).

- Wiki: docs/wiki/indicators/ reorganised into eight family folders; all 71
  indicator pages moved with `git mv`. Every internal cross-link is
  normalised to `../<family>/Indicator-X.md`, each page's `Family` field is
  set to its new family, and two pre-existing `../Indicator-Chaining.md`
  links (should have been `../../`) are corrected. A link check confirms
  every relative wiki link resolves.
- Indicators-Overview.md fully rewritten around the eight families;
  Home.md indicator reference and the README family table follow suit.
- Warmup-Periods.md gains the eight F13 indicators; CHANGELOG records the
  46-indicator expansion (25 -> 71) and the eight-family taxonomy.
- Tests: Node indicators.test.js and Python test_new_indicators.py cover
  all eight new indicators (Node 91/91, Python 117/117 green).

cargo fmt + clippy (core/wickra/data/wasm/node) clean; 508 core tests,
25 data tests and 74 doctests green.

CHANGELOG.md

@@ -8,19 +8,27 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
 ## [Unreleased]
 
 ### Added
-- 38 new technical indicators, taking the library from 25 to 63. Each is
-  implemented once in the Rust core and wired through the Python, Node and
-  WASM bindings, with reference-value tests and a dedicated wiki page:
-  - Trend: `Smma`, `Trima`, `Zlema`, `T3`, `Vwma`.
-  - Momentum: `Mom`, `Cmo`, `Tsi`, `Pmo`, `StochRsi`, `UltimateOscillator`,
-    `Ppo`, `Dpo`, `Coppock`, `AroonOscillator`, `Vortex`, `MassIndex`.
-  - Volatility: `Natr`, `StdDev`, `UlcerIndex`, `HistoricalVolatility`,
-    `BollingerBandwidth`, `PercentB`, `SuperTrend`, `ChandelierExit`,
-    `ChandeKrollStop`, `AtrTrailingStop`.
+- 46 new technical indicators, taking the library from 25 to 71 and
+  reorganising the catalogue into **eight families**, each with at least five
+  members. Every indicator is implemented once in the Rust core and wired
+  through the Python, Node and WASM bindings, with reference-value tests and a
+  dedicated wiki page:
+  - Moving Averages: `Smma`, `Trima`, `Zlema`, `T3`, `Vwma`.
+  - Momentum Oscillators: `Mom`, `Cmo`, `Tsi`, `Pmo`, `StochRsi`,
+    `UltimateOscillator`.
+  - Trend & Directional: `AroonOscillator`, `Vortex`, `MassIndex`,
+    `ChoppinessIndex`, `VerticalHorizontalFilter`.
+  - Price Oscillators: `Ppo`, `Dpo`, `Coppock`, `AcceleratorOscillator`,
+    `BalanceOfPower`.
+  - Volatility & Bands: `Natr`, `StdDev`, `UlcerIndex`,
+    `HistoricalVolatility`, `BollingerBandwidth`, `PercentB`, `TrueRange`,
+    `ChaikinVolatility`.
+  - Trailing Stops: `SuperTrend`, `ChandelierExit`, `ChandeKrollStop`,
+    `AtrTrailingStop`.
   - Volume: `Adl`, `VolumePriceTrend`, `ChaikinMoneyFlow`,
     `ChaikinOscillator`, `ForceIndex`, `EaseOfMovement`.
-  - Statistics: `TypicalPrice`, `MedianPrice`, `WeightedClose`,
-    `LinearRegression`, `LinRegSlope`.
+  - Price Statistics: `TypicalPrice`, `MedianPrice`, `WeightedClose`,
+    `LinearRegression`, `LinRegSlope`, `ZScore`, `LinRegAngle`.
 - `TickAggregator::with_gap_fill` — opt-in mode that emits a flat placeholder
   candle for every empty bucket between two ticks, keeping the candle series
   evenly spaced for downstream indicators.
@@ -33,6 +41,11 @@ and this project adheres to [Semantic Versioning](https://semver.org/spec/v2.0.0
   Dependabot configuration.
 
 ### Changed
+- The indicator wiki is reorganised into eight family folders under
+  `docs/wiki/indicators/` (`moving-averages/`, `momentum-oscillators/`,
+  `trend-directional/`, `price-oscillators/`, `volatility-bands/`,
+  `trailing-stops/`, `volume/`, `price-statistics/`); `Indicators-Overview.md`,
+  `Home.md` and the README indicator table follow the same eight families.
 - `TickAggregator::push` returns `Result<Vec<Candle>>` (was
   `Result<Option<Candle>>`) so a single tick can yield a closed bar plus gap
   fillers.