Enable gitlab ci
Adds a CI pipeline for build / test / publish stages, and update doc with info on how to access Jar via Maven.
How to register an account on GitLab. To prevent spam, new accounts are locked until approved by an admin or the approver bot. You can also file an unlock request to expedite access.
Support: mw:GitLab, how to host a project on GitLab, #wikimedia-gitlab on libera.chat, #GitLab on Phabricator.
Adds a CI pipeline for build / test / publish stages, and update doc with info on how to access Jar via Maven.