docs: add Windows troubleshooting guide for libmagic and MySQL

[Laks-D]

[IMPROVEMENT]

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Description

This PR introduces a dedicated Windows Troubleshooting section to the README.md. During the local setup process on a Windows environment, I identified and resolved several recurring blockers:

• libmagic dependency: Standard python-magic often fails to locate DLLs on Windows; added python-magic-bin workaround.
• MySQL Driver compatibility: Documented the pymysql dialect requirement for stable SQLAlchemy connections on local Windows MySQL instances.
• PowerShell Syntax: Provided the correct $env:FLASK_APP syntax for setting environment variables in Windows terminals.

Impact

These updates aim to streamline the onboarding process for new Windows-based contributors, reducing setup friction for the Sample Platform NG project.

Verification

• Verified python-magic-bin resolves the ImportError on Windows 11.
• Validated pymysql connection string in config.py.
• Confirmed PowerShell environment variable persistence for flask db commands.

[sonarqubecloud]

Quality Gate passed

Issues
0 New issues
0 Accepted issues

Measures
0 Security Hotspots
0.0% Coverage on New Code
0.0% Duplication on New Code

See analysis details on SonarQube Cloud