Reads the most recently used workspace root from the user's home directory.
Removes untitled workspaces that are not among the most recently used workspaces.
Use the untitledWorkspaceStaleThreshold
to configure when to delete workspaces.
Writes the given uri as the most recently used workspace root to the user's home directory.
Untitled workspaces that are not among the most recent N workspaces will be deleted on start. Increase this number to keep older files, lower it to delete stale untitled workspaces more aggressively.