Add license specifiers to Go files that were missing them: ``` // SPDX-License-Identifier: GPL-3.0-or-later ``` No functional changes.
This adds a `-wizard` CLI option to the Manager, which opens a webbrowser and shows the First-Time Wizard to aid in configuration of Flamenco. This is work in progress. The wizard is just one page, and doesn't save anything yet to the configuration.