feat: add momentum indicators and expand function coverage
Add a full Momentum Indicators category (momentum_indicators.go) with 26 new wrapped functions: ADX, ADXR, APO, AROON, AROONOSC, BOP, CCI, CMO, DX, IMI, MACD, MACDEXT, MACDFIX, MFI, MOM, MINUS_DI, MINUS_DM, PLUS_DI, PLUS_DM, PPO, ROC, ROCP, ROCR, ROCR100, RSI, STOCH, STOCHF, STOCHRSI, TRIX, ULTOSC, WILLR - Register all new native symbols in Load() (loader.go) - Declare corresponding native function variables in functions.go - Add MAType enum (ta_ma_type.go) for MA-type parameters (SMA, EMA, WMA, DEMA, TEMA, TRIMA, KAMA, MAMA, T3) - Add taResult constants (ta_result.go) mirroring TA-Lib return codes - Each wrapper includes a doc comment with formula, interpretation, and known behavioral edge-case notes
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