Proposal: expose manual installation of vscode-remote

<!-- 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. --> It would be nice if we could expose a more easy none reverseengineering method to install vscode-remote inside a container or target remote directory with a predefined config so a developer only needs to connect and it is all installed. i am aware that this is do able via vscode ide at present but i want a script able way to deploy many workspaces predefined. You maybe already got or can need the code for vscode-online anyway.