Release to PYPI for new tag with Github Actions

[kaleocheng]

We didn't update the package on PyPI for a while, bettter to add Github Actions for it

[sp3c73r2038]

speaking of PYPI packages, frontend app assets are shipped with them. so we may need a way to make sure assets are built before releasing to PYPI. Maybe not rely on assets committed into repo, instead build in GH Actions.