alternative for "copy name" on tables/views in sidebar "copy qualified name"

It would be great to be able to copy a qualified version of a table/view name. i.e. instead of just copying `table_name` copying `"schema_name"."table_name"`.

This option could be shown in the context menu when pressing the alt/option button.

Start by inspecting the sidebar context menu for tables and views, especially the existing “copy name” action. Add a “copy qualified name” option available with the alt/option key, and verify that it copies the schema and table/view names in the requested quoted form.

Written by the indexing model from the issue text.