readme updated for WSL in window set up

[MImran2002]

Description

This PR updates the BCSR README to replace the outdated Cloud9 development setup instructions with a current Windows development workflow using WSL and Ubuntu.

The updated documentation now includes instructions for:

• Checking for and installing WSL and Ubuntu
• Installing and verifying MySQL and MySQL Workbench
• Running the project inside the WSL Linux environment
• Activating the existing virtual environment using setup.sh
• Resolving CRLF/LF issues that can prevent setup.sh from running correctly
• Creating the required data directory
• Adding the existing database configuration to app/config.yaml
• Running create_db.py to initialize the development database
• Viewing the development database
• Running the Flask application with python3 app.py
• Updating the requirements and project structure sections to reflect the current development environment

This PR is documentation-only and does not change the existing application code or database implementation.

###Testing

To test this PR, the reviewer should follow the updated README setup instructions from beginning to end on a Windows development environment.

The reviewer should verify that the documented steps successfully lead to the BCSR development application running locally.

Some minor deviations may be necessary depending on the reviewer's existing Windows, WSL, Ubuntu, Python, or MySQL setup, but the overall setup process should remain accurate and usable.