feat(dynamics): add PlusDI, MinusDI, PlusDM, MinusDM indicators

Complete thin Dx-composition wrapper indicators with full test coverage:

- PlusDi/MinusDi: Directional Indicator wrappers (DiPlus/DiMinus from Dx)
- PlusDm/MinusDm: Directional Movement wrappers (DmPlus/DmMinus from Dx)
- Individual validation tests per indicator directory (TALib, Skender, bounds)
- Combined unit tests (DiDm.Tests.cs) and validation tests (DiDm.Validation.Tests.cs)
- Quantower wrappers + tests for all 4 indicators
- PineScript v6 implementations with compensated RMA
- Normalized .md documentation for all indicators and categories
- 182 tests passing, 0 failures

lib/volume/vf/Vf.md

@@ -1,5 +1,7 @@
 # VF: Volume Force
 
+> *Price without volume is like a punch without body weight behind it—VF measures the momentum of conviction.*
+
 | Property         | Value                            |
 | ---------------- | -------------------------------- |
 | **Category**     | Volume                        |
@@ -16,8 +18,6 @@
 - Requires `> period` bars of warmup before first valid output (IsHot = true).
 - Validated against TA-Lib, Skender, and Tulip reference implementations where available.
 
-> "Price without volume is like a punch without body weight behind it—VF measures the momentum of conviction." — Anonymous Quant
-
 Volume Force (VF) quantifies the strength of volume behind price movements by multiplying price change by volume and applying EMA smoothing with warmup compensation. The result is a momentum-style oscillator that distinguishes between genuine volume-backed moves and hollow price action.
 
 Unlike simple volume indicators that ignore direction, VF combines directional price change with volume intensity. Large volumes during significant price moves produce high VF readings; large volumes during flat price action contribute nothing. This selectivity makes VF particularly effective at filtering noise from signal.