F9: add Accumulation/Distribution Line and Volume-Price Trend

Completes the F9 family (Cumulative volume) end to end:

- Rust core: adl.rs (Accumulation/Distribution Line — cumulative
  range-weighted volume) and vpt.rs (Volume-Price Trend — cumulative
  volume scaled by percentage price change). Each with a full Indicator
  impl, runnable doctest and reference / cumulative-property / warmup /
  reset / batch==streaming tests.
- Python: PyAdl / PyVolumePriceTrend PyO3 classes + module registration
  + .pyi stubs (no parameters, like OBV/VWAP).
- Node: explicit AdlNode and VolumePriceTrendNode; index.d.ts and
  index.js updated.
- WASM: WasmAdl and WasmVolumePriceTrend.
- Wiki: Indicator-Adl.md and Indicator-VolumePriceTrend.md plus rows in
  Indicators-Overview.md and entries in Home.md.

cargo fmt + clippy (core/wickra/data/wasm/node) clean; 373 core tests,
25 data tests and 53 doctests green.

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

@@ -4,6 +4,7 @@
 //! volume) but every public name is also re-exported flat from this module and
 //! from the crate root for convenience.
 
+mod adl;
 mod adx;
 mod aroon;
 mod aroon_oscillator;
@@ -47,12 +48,14 @@ mod tsi;
 mod ulcer_index;
 mod ultimate_oscillator;
 mod vortex;
+mod vpt;
 mod vwap;
 mod vwma;
 mod williams_r;
 mod wma;
 mod zlema;
 
+pub use adl::Adl;
 pub use adx::{Adx, AdxOutput};
 pub use aroon::{Aroon, AroonOutput};
 pub use aroon_oscillator::AroonOscillator;
@@ -96,6 +99,7 @@ pub use tsi::Tsi;
 pub use ulcer_index::UlcerIndex;
 pub use ultimate_oscillator::UltimateOscillator;
 pub use vortex::{Vortex, VortexOutput};
+pub use vpt::VolumePriceTrend;
 pub use vwap::{RollingVwap, Vwap};
 pub use vwma::Vwma;
 pub use williams_r::WilliamsR;