🎨 Palette: Enhance CLI UX with colors, emojis, and better formatting

[google-labs-jules]

Improved the CLI output of the Bitcoin trading simulation to be more readable and visually appealing.

Changes:

• Replaced the verbose daily log with a clean, aligned table.
• Added ANSI color codes and emojis for Buy (🟢) and Sell (🔴) actions.
• Added color-coded Profit/Loss indicators in the final report.
• Fixed a pandas FutureWarning by initializing dataframe columns with explicit float types.
• Reduced output noise by only printing trades and periodic daily updates.

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PR created automatically by Jules for task 2069566007251033363 started by @EiJackGH

[google-labs-jules]

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