Desktop integration files for oidc-gen and oidc-agent and for creating the user dialog.

This package adds two ways for supporting the usage of oidc-agent in a graphical environment. The .desktop file to leverage browser integration to support the authorization code flow in oidc-gen. The Xsession file to consistently set the environment variables necessary to for client tools to connect to the oidc-agent daemon.

This package also provides a bash script as an interface to create different dialog windows. It uses yad to create windows.