* feat: Add file resource store
* test: Write some tests for FileResourceStore
* fix: Reformat code and fix various small things from reviews
* fix: Change constants to just be the corresponding URL
* fix: Remove extra unnecessary wrap in a Promise
* fix: Write some more tests and fix related bugs
* fix: Use old way to import fs promises to support older Node versions
* refactor: Refactor code and tests
* refactor: Refactor and better document code
* fix: Change comparison with undefined by typeof check
* fix: Invert typeof check
