Add Google Financial News Analysis Prompt Generator

[google-labs-jules]

Implemented a Python script Finance/generate_news_prompt.py to generate a standardized financial news analysis prompt based on user inputs.
Includes unit tests in Finance/test_generate_news_prompt.py.
The script allows customizing keyword, time range, region, and focus area.

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PR created automatically by Jules for task 3501718341321755846 started by @ewdlop

[google-labs-jules]

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