feat: add existing components to unit [FC-0083]#1811

ChrisChV merged 3 commits intoopenedx:masteropenedx/frontend-app-authoring:masterfrom

open-craft:rpenido/fal-4059/add-existing-component-to-unitopen-craft/frontend-app-authoring:rpenido/fal-4059/add-existing-component-to-unitCopy head branch name to clipboard