feat: republish core (#11)

* chore: build with tsup

* docs: add README for core package

* docs: cleanup plus use new package name

* docs: cleanup comments plus update title

* docs: cleanup validated example

* docs: more cleanup

* docs: cleanup

* docs: cleanup logged snippet

* chore: to proper version

* docs: call out other packages in Get Started

* docs: minimal type checks on restrictedTo snippet