* Add support for scanning evaluation context from smart cells
* Rename prev_locator to base_locator to clarify the meaning
* Adjustments
* Add data tests
* Adjustments
* Test smart cell intearaction with RuntimeServer
* Serialize binding scanning and leave sending to the user
* Monitor the scanning process
* Introduce file system abstraction and an S3 implementation
* Support arbitrary absolute paths and delegate resolution to file system
* Remove accidental notebook file
* Apply suggestions from code review
Co-authored-by: José Valim <jose.valim@dashbit.co>
* Apply review comments
* Add missing path assertions
* Apply review comments
* Fix test saving notebook in project root
Co-authored-by: José Valim <jose.valim@dashbit.co>
