No needs results in broken needs.json

[a-zw]

If a documentation contains no needs elements, you can still build a needs.json file and use it elsewhere. The consumer breaks though:

Traceback (most recent call last):
  File .../_main/bazel-out/k8-fastbuild/bin/docs.runfiles/.docs.venv/lib/python3.12/site-packages/sphinx_needs/external_needs.py", line 97, in load_external_needs
    data = needs_json["versions"][version]
           ~~~~~~~~~~~~~~~~~~~~~~^^^^^^^^^
KeyError: '0.1.0'

The needs.json file in my case looked like this:

{"current_version": "0.1.0", "project": "foo", "project_url": "https://bar", "versions": {}}

Judging from exception above, it should work if it were:

{"current_version": "0.1.0", "project": "foo", "project_url": "https://bar", "versions": {"0.1.0": {}}}

Alternatively, the consumer code could be made more robust or both?

Worked around here: https://github.com/eclipse-score/reference_integration/pull/28/files#diff-3053677e4333a96b20ed76c662bca07fb2e1ce059479170139209356787da09cR20