Snapshots

Select one or more folders to quickly save/load a Snapshot of your current session.
Use a shared folder on your show to easily share session files with other users.

The issue names no files, tests, or entry points, so first clarify the snapshot format, session state, folder-selection behavior, and sharing requirements with maintainers. Done should support selecting one or more folders and saving or loading the current session from a shared show folder.

Written by the indexing model from the issue text.