Summary

This PR removes all the remaining enums on the project as babel doesn't support const enum directly.
The refactoring doesn't create any breaking change, just a bit more verbose code.

@emmacunningham I've also seen a problem with the AnnotationType , not resolved in this PR but I can work on it:

export const AnnotationTypes = Object.freeze({
  Line: 'line' as AnnotationType,
  Rectangle: 'rectangle' as AnnotationType,
  Text: 'text' as AnnotationType,
});

export type AnnotationType = 'line' | 'rectangle' | 'text';

in this way, if you specify something like

const annotation = AnnotationTypes.Line

the type of annotation is AnnotationType and not line that means that if you want to do typechecking on that variable needs to go in a different way. I've fixed that behaviour specifying the exact type for every object value like Bottom: 'bottom' as 'bottom' and I've reused the typeof Position.Bottom instead of rewriting the string type. Let me know what do you think

Checklist

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• Any consumer-facing exports were added to src/index.ts (and stories only import from ../src except for test data & storybook)
• [ ] This was checked for cross-browser compatibility, including a check against IE11
• [ ] Proper documentation or storybook story was added for features that require explanation or tutorials
• Unit tests were updated or added to match the most common scenarios
• Each commit follows the convention