🎨 Palette: Add CLI arguments and accessibility options

[EiJackGH]

💡 What: Added argparse support to bitcoin_trading_simulation.py with options for simulation parameters (--days, --initial-cash, etc.), --quiet mode, and --no-color mode. Updated .gitignore to exclude python cache.
🎯 Why: To allow users to customize the simulation without editing code and to support accessibility (monochrome terminals) and automation (quiet mode).
📸 Before/After: N/A (CLI)
♿ Accessibility: Added --no-color flag to disable ANSI color codes for better readability on non-color terminals or for users with visual impairments who prefer plain text.

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PR created automatically by Jules for task 9841519633443676201 started by @EiJackGH

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