There is already a Microsoft SQL server extension for VS Code and this looks to effectively be a clone of it. After giving this a quick spin, it looks and feels the same as the SQL server extension, with the same menus, dialogs, etc. The SQL server extension I believe is what formed the basis of the now-deprecated Azure Data Studio (which was a VS code fork).

See here for the SQL server extension: https://marketplace.visualstudio.com/items?itemName=ms-mssql...