missing darktable.gui.mimic

[phrrk]

I have not been able to find darktable.gui.mimic referred to anywhere in the API manual

[wpferguson]

As soon as I get through beating the maintainer of the docs for missing this, I'll fix it.

Thanks for the catch.

[wpferguson]

In the meantime, here's the original PR with some documentation, darktable-org/darktable#13579

[wpferguson]

Added, I'm just waiting for @dterrahe's blessing before I close this.