Create filter for needs.json export

[twodrops]

Current needs builder exports the already imported needs.json (with needimport) when "needs" builder is used.

[danwos]

The user can already define their own export filter when using the needs.json builder: https://sphinx-needs.readthedocs.io/en/latest/configuration.html#needs-builder-filter

Is this already enough or is the goal of this ticket to update the default filter, so that all imported needs do not get exported?

[twodrops]

@danwos Yes, the second part. The imported needs with needimport shall not be exported. I guess this can be done by using "tags" with needimport and a filter expression in needs-builder-filter using the tags right. If yes, this can be closed.

Thanks for the hint.

[danwos]

Feature is already available as described by @twodrops