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kingchenc b7ef63400d Add the R binding over the C ABI hub (#230 )

Adds an R binding (`bindings/r`) over the C ABI hub — the third language stecker after C# and Go, reaching the hub through R's native `.Call` interface (not extendr).

## What's here
- **`bindings/r`** — an R package exposing all 514 indicators as constructors that return a `wickra_indicator` object with generic `update`/`batch`/`reset` methods. The C glue (`src/wickra.c`) and R wrappers (`R/indicators.R`) are generated from `bindings/c/include/wickra.h` (same archetype taxonomy as the C#/Go generators: scalar/batch, multi-output, bars, profile, profile-values, array-input). The opaque handle is an R external pointer freed by a registered finalizer; multi-output returns a named vector (`NA` at warmup), bars a matrix, profiles a list.
- **`examples/r`** — the full example suite mirroring C/C#/Go: streaming, backtest, multi_timeframe, parallel_assets (`mclapply`), three strategies, and `fetch_btcusdt`/`live_binance`.
- **CI** — an `r` job builds the C ABI library, installs the package, runs the `testthat` suite and the offline examples on Linux, macOS and Windows (`R CMD check` is clean: 0 warnings, 0 notes).
- **Docs** — R added to the README languages table, project layout, building/testing, CONTRIBUTING binding table + regenerate note, ARCHITECTURE, examples index, issue/PR templates, the About-description template, and the other binding READMEs.

## Linking / distribution
The package compiles a thin `.Call` glue layer against the prebuilt C ABI library (header via `WICKRA_INCLUDE_DIR`, library via `WICKRA_LIB_DIR`). On Windows the package's own `wickra.dll` would collide with the C ABI's `wickra.dll`, so `configure.win` stages a renamed copy (`wickra_abi.dll`) and builds an import library referencing it; `install.libs.R` bundles the DLL and `.onLoad` puts it on the load path. On Linux/macOS the rpath locates the shared library. No `release.yml` change — R is distributed via r-universe / source install (gated).

No Rust crate or `Cargo.toml` change — the R package is standalone and additive.

2026-06-09 19:18:40 +02:00

README.md

Add the R binding over the C ABI hub (#230 )

2026-06-09 19:18:40 +02:00

README.md

Documentation

Wickra's full documentation lives at docs.wickra.org.

That includes:

Quickstarts for Rust, Python, Node, WASM, C, C#, Go, and R.
A per-indicator deep dive for every one of the 514 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.
Reference pages: warmup periods, streaming vs batch, indicator chaining, and the data layer.
Guides: Cookbook, TA-Lib migration, FAQ.

Editing the docs

The documentation site is a separate git repository at https://github.com/wickra-lib/wickra-docs. Open a pull request there to propose changes; the site is built with VitePress and deploys to docs.wickra.org.