feat(family-09): add 7 trailing stops (HiLo, Volty, Yo-Yo, Donchian, Pct, Step, Renko) (#46)

* feat(family-09): add 7 trailing stops (HiLo, Volty, Yo-Yo, Donchian, Pct, Step, Renko)

Rounds out the Trailing Stops family from 5 to 12 indicators:

- HiLoActivator (Crabel): SMA-of-high/SMA-of-low trail with a one-bar
  lag; emits the opposite-side SMA as the trailing stop.
- VoltyStop (Cynthia Kase): ATR trail anchored on the extreme close
  since the trade was opened — tighter than AtrTrailingStop on
  pullbacks.
- YoyoExit: long-only ATR trail with an explicit re-entry trigger at
  trail + multiplier*ATR; exposes an in_trade flag.
- DonchianStop (Turtle): lowest low / highest high over the window;
  multi-output {stop_long, stop_short}.
- PercentageTrailingStop: fixed-percent trail that scales across
  instruments without per-asset tuning.
- StepTrailingStop: snaps to a step_size-aligned grid; mirrors
  discretionary stop-by-hand workflow.
- RenkoTrailingStop: block-anchored trail; only moves on full-block
  advances, ignores intra-block noise.

All seven are wired into wickra-core, the Python / Node / WASM
bindings, the indicator_update + indicator_update_candle fuzz targets,
the wickra bench harness, and the Python + Node test suites. README
counter bumps from 71 to 78; CHANGELOG entry under [Unreleased].

* fix(family-09): satisfy pedantic clippy lints

- hilo_activator: rewrite match-Some/None as if-let-else (single_match_else),
  add backticks around the HiLo identifier in module/struct doc (doc_markdown).
- percentage / step / renko trailing stop tests: use f64::from(i32) instead
  of `as f64` (cast_lossless).
- bench `benches()` is now >100 lines after Family 09 was wired in; allow
  too_many_lines (matches the python pymodule fn).

crates/wickra-core/src/indicators/mod.rs

@@ -38,6 +38,7 @@ mod coppock;
 mod dema;
 mod demand_index;
 mod donchian;
+mod donchian_stop;
 mod double_bollinger;
 mod dpo;
 mod ease_of_movement;
@@ -48,6 +49,7 @@ mod force_index;
 mod fractal_chaos_bands;
 mod frama;
 mod garman_klass;
+mod hilo_activator;
 mod historical_volatility;
 mod hma;
 mod hurst_channel;
@@ -75,11 +77,13 @@ mod nvi;
 mod obv;
 mod parkinson;
 mod percent_b;
+mod percentage_trailing_stop;
 mod pgo;
 mod pmo;
 mod ppo;
 mod psar;
 mod pvi;
+mod renko_trailing_stop;
 mod roc;
 mod rogers_satchell;
 mod rsi;
@@ -93,6 +97,7 @@ mod standard_error_bands;
 mod starc_bands;
 mod stc;
 mod std_dev;
+mod step_trailing_stop;
 mod stoch_rsi;
 mod stochastic;
 mod super_trend;
@@ -110,6 +115,7 @@ mod ulcer_index;
 mod ultimate_oscillator;
 mod vertical_horizontal_filter;
 mod vidya;
+mod volty_stop;
 mod volume_oscillator;
 mod vortex;
 mod vpt;
@@ -122,6 +128,7 @@ mod weighted_close;
 mod williams_r;
 mod wma;
 mod yang_zhang;
+mod yoyo_exit;
 mod z_score;
 mod zero_lag_macd;
 mod zlema;
@@ -160,6 +167,7 @@ pub use coppock::Coppock;
 pub use dema::Dema;
 pub use demand_index::DemandIndex;
 pub use donchian::{Donchian, DonchianOutput};
+pub use donchian_stop::{DonchianStop, DonchianStopOutput};
 pub use double_bollinger::{DoubleBollinger, DoubleBollingerOutput};
 pub use dpo::Dpo;
 pub use ease_of_movement::EaseOfMovement;
@@ -170,6 +178,7 @@ pub use force_index::ForceIndex;
 pub use fractal_chaos_bands::{FractalChaosBands, FractalChaosBandsOutput};
 pub use frama::Frama;
 pub use garman_klass::GarmanKlassVolatility;
+pub use hilo_activator::HiLoActivator;
 pub use historical_volatility::HistoricalVolatility;
 pub use hma::Hma;
 pub use hurst_channel::{HurstChannel, HurstChannelOutput};
@@ -197,11 +206,13 @@ pub use nvi::Nvi;
 pub use obv::Obv;
 pub use parkinson::ParkinsonVolatility;
 pub use percent_b::PercentB;
+pub use percentage_trailing_stop::PercentageTrailingStop;
 pub use pgo::Pgo;
 pub use pmo::Pmo;
 pub use ppo::Ppo;
 pub use psar::Psar;
 pub use pvi::Pvi;
+pub use renko_trailing_stop::RenkoTrailingStop;
 pub use roc::Roc;
 pub use rogers_satchell::RogersSatchellVolatility;
 pub use rsi::Rsi;
@@ -215,6 +226,7 @@ pub use standard_error_bands::{StandardErrorBands, StandardErrorBandsOutput};
 pub use starc_bands::{StarcBands, StarcBandsOutput};
 pub use stc::Stc;
 pub use std_dev::StdDev;
+pub use step_trailing_stop::StepTrailingStop;
 pub use stoch_rsi::StochRsi;
 pub use stochastic::{Stochastic, StochasticOutput};
 pub use super_trend::{SuperTrend, SuperTrendOutput};
@@ -232,6 +244,7 @@ pub use ulcer_index::UlcerIndex;
 pub use ultimate_oscillator::UltimateOscillator;
 pub use vertical_horizontal_filter::VerticalHorizontalFilter;
 pub use vidya::Vidya;
+pub use volty_stop::VoltyStop;
 pub use volume_oscillator::VolumeOscillator;
 pub use vortex::{Vortex, VortexOutput};
 pub use vpt::VolumePriceTrend;
@@ -244,6 +257,7 @@ pub use weighted_close::WeightedClose;
 pub use williams_r::WilliamsR;
 pub use wma::Wma;
 pub use yang_zhang::YangZhangVolatility;
+pub use yoyo_exit::YoyoExit;
 pub use z_score::ZScore;
 pub use zero_lag_macd::{ZeroLagMacd, ZeroLagMacdOutput};
 pub use zlema::Zlema;