ability to open vscode from `code` command line that focuses integrated terminal

<!-- ⚠️⚠️ Do Not Delete This! feature_request_template ⚠️⚠️ --> <!-- Please read our Rules of Conduct: https://opensource.microsoft.com/codeofconduct/ --> <!-- Please search existing issues to avoid creating duplicates. --> <!-- Describe the feature you'd like. --> i see some open issues on checking if the terminal is focused. apologies if there's overlap. i often run the shell command `code ...` to open up files and folders. i write in julia, and julia has a nice function called `edit` that allows me to open the specific method that will be called based on type information. there is another tool (Chthulhu.jl) facilitates traversing the call tree and uses this `edit` function to allow users to open the code of the current method. one slight annoyance is that vscode focuses the text editor by default when `code myfile.jl` is called. this makes a lot of sense in many cases, but when traversing the call tree, I typically just want to see the code, and less often want to edit it. focusing the editor means having to do (ctrl+~) each time you traverse the tree, which takes me out of "the flow" i realize that expanding the scope of what the `code` cli command could do could very well be a slippery slope. so i don't know anything about vscode internals nor how feasible implementing it would be, but it would make the debugging experience in julia magical! here is a little video that demonstrates needing to refocus the terminal each time i descend/ascend the call tree https://user-images.githubusercontent.com/33790004/207106379-f20f510a-0b18-400f-ad7f-7dc989b86352.mp4 thank you for vscode! i love it