type-checking can't use config-file outside of project root
If the python/type-checking component is pointed at a project_dir that isn't the project root, mypy doesn't automatically discover a configuration file in that subtree, meaning any config is ignored.
Support should be added for specifying arbitrary mypy_options as an input, allowing the user to manually specify the config file, or anything else.
It would also be nice to try and automatically find the config file under $[[ inputs.project_dir ]] in the same way as is attempted for python_coverage.