* Create issue-add-to-parent-project.yml
Tested in https://github.com/grafana/github-actions-testrepo/blob/main/.github/workflows/issue-add-to-parent-project.yml
* Rename issue-add-to-parent-project
Rename issue-add-to-parent-project and update to make it clear it's Platform UX specific for now.
* Add action trigger on closed epics
Update epic-add-to-platform-ux-parent-project.yml to add action trigger on closed alongside the others and fix typo.
