Importing PuTTY sessions

# Description of the new feature/enhancement
I wonder if there's a chance for (or a way if it is there and I can't simply find it ;)) making import and later sync for PuTTY sessions. I do know that PuTTY can't be used inside Terminal but it would be great if we could simply import and manage sessions instead of making all the entries.

# Proposed technical implementation details (optional)
There are tools that wraps putty (like SuperPuTTY for example) and they have a way to import sessions by opening window for that.
What I'd like to get is to have new option when adding new profile. That could be a button that would open window with a list of PuTTY sessions where I could choose which one I'd like to import as a Terminal profiles.
As a bonus feature it would be great to have checkbox for syncing all the profiles so if I'll get a new one in putty it will show up in Terminal as well.
Cherry on top would be to have auto sync for all the imported profiles to stay up to date with Putty but at least manual sync would be enough.

Is that even possible to achieve?

No files, tests, or entry points are named. Start by locating the existing profile-management and import paths, then determine the scope for selecting PuTTY sessions and supporting manual or automatic synchronization.

Written by the indexing model from the issue text.