Provide variable to disable open new workspace

[jan-vcapgemini]

As an IDEasy user I want to have the option to disable the open new window feature e.g. the --new-window option of vscode for each of my IDEs.
We need to add a new variable to our IdeVariables or to our IdeToolCommandlets so the user can decide if he wants to disable this feature.
We also need to check if this --new-window option is required for vscode at all.