Add delete confirmation to testsys CLI

Currently testsys can run commands like `uninstall` `reset-test` and `delete` without any confirmation window. This can be problematic since once a command like these are issued, it can be irreversible. Add a confirmation check to the testsys CLI to make sure the user is sure that these commands need to be run.

Start at the testsys CLI entry points for the `uninstall`, `reset-test`, and `delete` commands and trace how each command is dispatched. Add a confirmation check before these irreversible operations, with completion verified by checking that each command requires the user to confirm before running.

Written by the indexing model from the issue text.