refactor: rename CoreTraidMath.py to CoreTradeMath.py

Fix typo in core math module filename and update all references.

Changes:
- Renamed market_trade/core/CoreTraidMath.py → CoreTradeMath.py
- Updated 28 import references across 14 files:
  - All Ind_*.py indicator modules
  - indicators.py, indicators_v2.py
  - signals.py, signals_v2.py
  - CoreDraw.py
- Updated documentation references in CLAUDE.md

This eliminates the "Traid" typo and aligns with proper English spelling.

🤖 Generated with [Claude Code](https://claude.com/claude-code)

Co-Authored-By: Claude <noreply@anthropic.com>

market_trade/core/signals.py

@@ -2,7 +2,7 @@ import pandas as pd
 import datetime
 import numpy as np
 
-import market_trade.core.CoreTraidMath
+import market_trade.core.CoreTradeMath
 import market_trade.core.CoreDraw
 from tqdm import tqdm