Add one-line project description to README

[Copilot]

README lacked a concise summary of the project's purpose at the top. Added single-line description immediately after the title to quickly communicate the project's scope to new visitors.

Changes

• Added bold one-line description after title: "AI-powered machine learning application for predicting bank customer churn risk with visual analytics, automated insights, and personalized retention strategies."

This provides immediate context about:

• Core functionality (churn prediction)
• Technical approach (AI/ML)
• Key features (analytics, insights, retention)

Original prompt

in 1 line, plz describe the use case and description of this project n topic

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