createWorkspacePaths doesn't check if vscode.workspace.workspaceFolders is undefined or not

[Jose Leon]

In this function, vscode.workspace.workspaceFolders can be undefined if no workspace is open. Apart from that, vscode.workspace.textDocuments can be empty, so a proper checking should be done.

At some specific conditions, hard to reproduce, the extension cannot be activated because of this.

[Christopher Wosinski]

Thanks for analyzing this issue. Maybe the extension needs to be activated differently. I need to check first.