F10: add Chaikin Money Flow, Chaikin Oscillator, Force Index and Ease of Movement

- Rust core: cmf.rs (Chaikin Money Flow — summed money-flow volume over
  summed volume, bounded to [-1, +1]), chaikin_oscillator.rs (Chaikin
  Oscillator — the MACD of the ADL, EMA(ADL, fast) - EMA(ADL, slow)),
  force_index.rs (Elder's Force Index — EMA of price change scaled by
  volume), ease_of_movement.rs (Arms' Ease of Movement — SMA of distance
  travelled per unit of volume). Each with a full Indicator impl,
  runnable doctest and reference / property / warmup / reset /
  batch==streaming tests.
- Python: PyChaikinMoneyFlow / PyChaikinOscillator / PyForceIndex /
  PyEaseOfMovement PyO3 classes + module registration + .pyi stubs.
- Node: explicit ChaikinMoneyFlowNode / ChaikinOscillatorNode /
  ForceIndexNode / EaseOfMovementNode; index.d.ts and index.js updated.
- WASM: WasmChaikinMoneyFlow / WasmChaikinOscillator / WasmForceIndex /
  WasmEaseOfMovement.
- Wiki: Indicator-ChaikinMoneyFlow/ChaikinOscillator/ForceIndex/
  EaseOfMovement.md plus a new "Oscillators" sub-table in
  Indicators-Overview.md and entries in Home.md.

cargo fmt + clippy (core/wickra/data/wasm/node) clean; 402 core tests,
25 data tests and 57 doctests green.

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

@@ -13,12 +13,16 @@ mod awesome_oscillator;
 mod bollinger;
 mod bollinger_bandwidth;
 mod cci;
+mod chaikin_oscillator;
+mod cmf;
 mod cmo;
 mod coppock;
 mod dema;
 mod donchian;
 mod dpo;
+mod ease_of_movement;
 mod ema;
+mod force_index;
 mod historical_volatility;
 mod hma;
 mod kama;
@@ -64,12 +68,16 @@ pub use awesome_oscillator::AwesomeOscillator;
 pub use bollinger::{BollingerBands, BollingerOutput};
 pub use bollinger_bandwidth::BollingerBandwidth;
 pub use cci::Cci;
+pub use chaikin_oscillator::ChaikinOscillator;
+pub use cmf::ChaikinMoneyFlow;
 pub use cmo::Cmo;
 pub use coppock::Coppock;
 pub use dema::Dema;
 pub use donchian::{Donchian, DonchianOutput};
 pub use dpo::Dpo;
+pub use ease_of_movement::EaseOfMovement;
 pub use ema::Ema;
+pub use force_index::ForceIndex;
 pub use historical_volatility::HistoricalVolatility;
 pub use hma::Hma;
 pub use kama::Kama;