You find a dedicated documentation for each connector in Reqtify under Help > Coupling Notes
Note: New connectors can be provided on request.
To be able to import, export ReqIf you need to install Reqtify Gatway, whích is a seperate option.
For the freely available editor Visual Studio: https://code.visualstudio.com
There is also a OTScript-plugin available, which supports syntax highlighting and code-completion: https://marketplace.visualstudio.com/items?itemName=Dassault.otscript-reqtify