* debug script for people to test openmm
* Added news entry
* added checking which platforms can do mixed p
* fix typo in debug script
* added how to run script
* point to new showcase
* give full path to assests to avoid copying notebooking into build env
* rerun ci
* fix mypy env
* looks like we still need to pin mypy but can relax python
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Co-authored-by: Irfan Alibay <IAlibay@users.noreply.github.com>