* move core into repo, apps into apps folder, update tests

* Update scripts for build:core

* improve scripts

* remove noise from www

* Update .gitignore

* Fix focus bug

* add ci test script

* Update main.yml

* defer cloning

* basic snapping

* Improves algorithm for snap points, rendering

* Improves snapping, snaplines

* Enables a clone to snap to its parent

* Adds overlay

* Fix overlay, zoom scaling for distance and speed

* Fixes cleanup for new shapes on undo

* Fix streamline

esbuild isn't currently tree shaking intersections, but that's a file where we could save some room