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/momentum/rsi/Rsi.md

@@ -1,5 +1,7 @@
 # RSI: Relative Strength Index
 
+> *Momentum is the premier anomaly.*
+
 | Property         | Value                            |
 | ---------------- | -------------------------------- |
 | **Category**     | Momentum                        |
@@ -16,8 +18,6 @@
 - Requires `period + 1` bars of warmup before first valid output (IsHot = true).
 - Validated against TA-Lib, Skender, and Tulip reference implementations where available.
 
-> "Momentum is the premier anomaly." — Clifford Asness, AQR Capital (who actually said it, and meant it)
-
 The Relative Strength Index measures the speed and magnitude of price changes. Introduced by J. Welles Wilder Jr. in 1978, it oscillates between 0 and 100, identifying overbought and oversold conditions. The "Relative Strength" name is misleading: RSI measures internal strength (price versus itself) not relative strength (asset versus benchmark). Wilder knew this. He kept the name anyway. Marketing, perhaps.
 
 ## Historical Context