🎨 Palette: Add thousands separators to daily ledger outputs

[EiJackGH]

💡 What

Added thousands separator formatting (:,.2f for cash/prices and :,.4f for BTC amounts) to the daily simulation ledger output in bitcoin_trading_simulation.py.

🎯 Why

When dealing with large numbers, particularly in a financial context like a simulated Bitcoin portfolio, reading numbers like $123456.78 is significantly harder than $123,456.78. This simple formatting change vastly reduces the cognitive load for users parsing the daily logs.

📸 Before/After

Before:
Day 25: Portfolio Value: $10345.67, Cash: $10345.67, BTC: 0.0000

After:
Day 25: Portfolio Value: $10,345.67, Cash: $10,345.67, BTC: 0.0000

♿ Accessibility

This acts as a major cognitive accessibility improvement. Users with dyslexia or dyscalculia, as well as general users, benefit greatly from the clear delineation of thousands in long numeric strings.

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PR created automatically by Jules for task 5830032307975328485 started by @EiJackGH

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