Add workflow to allow this repo be a Helm chart repository

[lucaam]

• Please check if the PR fulfills these requirements

• [x] The branch naming convention follows our guidelines

• [ ] Docs have been added / updated (for bug fixes / features)

• What kind of change does this PR introduce? (Bug fix, feature, docs update, ...)

* **What is the current behavior?** (You can also link to an open issue here) * **What is the new behavior (if this is a feature change)?** * **Does this PR introduce a breaking change?** (What changes might users need to make in their application due to this PR?) * **Other information**:

[lucaam]

@fonzdm this requires a branch called gh-pages and the Github Pages enabled