New: support git URL/ref plugin install and source persistence#96

taylortom with Copilot wants to merge 4 commits into

masteradapt-security/adapt-authoring-contentplugin:masterfrom

copilot/add-support-for-git-urlsadapt-security/adapt-authoring-contentplugin:copilot/add-support-for-git-urlsCopy head branch name to clipboard