Document How to Use Visual Studio Code Debugger with QGIS Plugin Development

[zacdezgeo]

We need to add documentation outlining the steps required to set up and use the Visual Studio Code debugger for debugging the QGIS plugin. This documentation should cover configuring launch.json, attaching to the QGIS process, and using breakpoints to debug Python code effectively. It should also include common troubleshooting tips for issues like module import errors and path resolution when debugging QGIS plugins.

included in #174