* enable mypy in setup.cfg

* add some more type annotations

* add py.typed

* add mypy to ci

* fix some type annotations

* Move array context functionality over from meshmode

Co-authored-by: Alex Fikl <alexfikl@gmail.com>

* Drop sphinx version requirement

* Fix replica DOFArray in tests for pylint

Co-authored-by: Alex Fikl <alexfikl@gmail.com>