addRoot method
Add a root to the client's local list. When the client declared
rootsListChanged, the server is told with
notifications/roots/list_changed (not on 2026-07-28, which has no
such notification).
A root is a file:// URI (client/roots) with no .. segments, so a
server cannot be pointed outside it.
Implementation
@override
void addRoot(Root root) => inner.addRoot(root);