Adds lists of modules for command line and project installer.

This adds a list of available modules to the bottom of the Backdrop Upgrade Status report. There is a Bee command that can be cut and pasted to download all the modules at once. There is also a list of the machine names with each of them on a new line so it can be cut and pasted into the Backdrop Project Installer.

For a site with many modules this would streamline the process of getting the Backdrop site ready for an upgrade.