Summary:
1) Add VSCode settings to the source control, so users won't need to configure them
2) Copy VSCode settings to both "sonar" and "sonar/desktop" folders so both folders can be opened for development
Reviewed By: passy
Differential Revision: D20594643
fbshipit-source-id: 4331659008e4dbf9dfcc44a3723ab0612a3bd333