feat: provide writer.yml as stub

Author: jackhodgkiss

etc/kayobe/inventory/group_vars/github-writer/writer.yml

@@ -0,0 +1,8 @@
+---
+# Configuration of GitHub workflows generated with stackhpc.kayobe_workflows.github should go here.
+# See documentation for more information
+# https://github.com/stackhpc/ansible-collection-kayobe-workflows/blob/main/roles/github/README.md
+
+###############################################################################
+# Dummy variable to allow Ansible to accept this file.
+workaround_ansible_issue_8743: yes