Add a template for generating backend kickoffs
Adds a template for easier creation of backend kickoff issues like https://gitlab.com/gitlab-org/plan/issues/55 and https://gitlab.com/gitlab-org/plan/issues/56
Adds a template for easier creation of backend kickoff issues like https://gitlab.com/gitlab-org/plan/issues/55 and https://gitlab.com/gitlab-org/plan/issues/56