* create chart test and release pipelines on github
* publish chart
* update docs in core
* deprecate github.com/opf/openproject-helm-chart

relevant PRs:

* Begin of the insertion[https://github.com/opf/helm-charts/pull/1](https://github.com/opf/helm-charts/pull/1) End of the insertion Begin of the deletion [https://github.com/opf/openproject-helm-chart/pull/4](https://github.com/opf/openproject-helm-chart/pull/4)End of the deletion
* Begin of the insertion[https://github.com/opf/openproject-helm-chart/pull/4](https://github.com/opf/openproject-helm-chart/pull/4)End of the insertion Begin of the deletion [https://github.com/opf/helm-charts/pull/1](https://github.com/opf/helm-charts/pull/1)End of the deletion
* Begin of the insertion [https://github.com/opf/openproject/pull/11946](https://github.com/opf/openproject/pull/11946)End of the insertion