Extend the preconnect functionality

I'm currently trying to find a solution for an automatic sync to my target servers, when connection through VS Code remote SSH. I've already got my local shell scripts doing exactly that.

I've found the remote.SSH.preconnect option, which would potentially work, but I would need to create a script for each and every host I want to connect to, plus in my use case I am syncing different data depending on the user I'm connecting with. Which wouldn't be that big of a deal, if I would be working with a few VMs only. Currently I've got 70 host to user combinations, which can easily grow up to the hundreds.

So, instead of having hundreds of scripts it would be great to be able to add arguments to the config, at least in the per host configuration, and there at least some "hardcoded values". Even better if it would be possible to use the data which is already present in VS Code.

Minimum requirement:
"remote.SSH.preconnect": {
"host1": "/usr/local/bin/syncEnvironment user1 host",
"host2": "/usr/local/bin/syncEnvironment user2 host",
"host3": "/usr/local/bin/syncEnvironment user3 host",
},

Ideally:
"remote.SSH.preconnect": "/usr/local/bin/syncEnvironment $user-which-I-told-VSCode-to-connect-with $host-which-I-told-VScode-to-connect-to",

Start with the remote.SSH.preconnect setting and the existing local syncEnvironment scripts described in the issue. Determine how per-host configuration and the VS Code connection user and host values could be exposed; done means one configuration can invoke the sync command for many host/user combinations without a separate script for each host.