Improved README: Simplified Installation Instructions and Clarified Key Features

[habibimazin]

This PR improves the README by simplifying installation instructions and clarifying key feature descriptions.

Changes:

• Streamlined installation steps for setting up Ruby, database, and Redis, reducing redundancy and making them easier to follow.
• Clarified the description of the privacy-sensitive location tagging system to better explain its importance.
• Improved general readability and conciseness throughout the document.

This update makes the README more accessible for new contributors.

[welcome[bot]]

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[qlty-cloud-legacy[bot]]

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