Starting from OCP 4.7, Dev Console supports adding quickstarts via CRs that each operator installs on the cluster:
https://github.com/openshift/api/pull/750/

Prior to OCP 4.7, these quickstarts were installed statically by Dev Console:
https://github.com/openshift/console/blob/master/frontend/packages/console-app/src/components/quick-starts/data/mocks/yamls/install-associate-pipeline-quickstart.yaml

The goal is to extract these quickstarts from the static files and pipelines operator would create quickstart CRs when it gets installed.