ci: update actions versions

fix handling of undefined type annotations when from __future__ impor…

…t annotations is on

ci updates: sync with pympalte

- use python 3.12
- use ruff instead of pylint
- use pyproject.toml

core: disabling cachew through CACHEW_DISABLE env (#56)

* core: disabling cachew through CACHEW_DISABLE env

setup: install all namespace packages (instead of just 'cachew')

update readme

refresh readme

core: use ParamSpec for better type checking

core: properly dispose of sqlalchemy engine

otherwise for some reason this was causing shm/wal turnds (and test_cache_paths to fail)

the commit that 'broke' it is sqlalchemy/sqlalchemy@22ed657 -- not sure what's up

readme: regenerate & fix template after nbconvert update