added recipe for configmypy

[sarthakpati]

Checklist

• Title of this PR is meaningful: e.g. "Adding my_nifty_package", not "updated meta.yaml".
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[sarthakpati]

Opened a new PR per comment in #28667

Tagging @ocefpaf

[github-actions]

Hi! This is the staged-recipes linter and your PR looks excellent! 🚀

[conda-forge-admin]

Hi! This is the friendly automated conda-forge-linting service.

I just wanted to let you know that I linted all conda-recipes in your PR (recipes/configmypy/meta.yaml) and found it was in an excellent condition.

[sarthakpati]

@conda-forge/help-python please review