Add *.json/*.yaml config files for pynxtools readers
Some readers have *.json files for configuration. This adds them to nomads MANIFEST.in so they are copied into the package.
The old module-image for the shared runners will be discontinued on October 31. All users still referencing gitlab-registry.mpcdf.mpg.de/mpcdf/module-image in their CI pipelines need to switch to the new CI images now, see instructions here.
Some readers have *.json files for configuration. This adds them to nomads MANIFEST.in so they are copied into the package.