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Description
Is your feature request related to a problem? Please describe.
In the docs, _copier_conf is referenced several times. But I can't find documentation on what all is actually in there.
It seems like some of the examples in the documentation are like the attributes here: https://github.com/copier-org/copier/blob/master/copier/main.py#L89-L160
Is that the total content of _copier_conf?
Describe the solution you'd like
Documentation on what _copier_conf contains so it can be referred to in various configuration cases.
Describe alternatives you've considered
Additional context