Version 1.0.0

[personalizedrefrigerator]

Summary

This pull request contains changes planned for version 1.0.0.

Preview this pull request here: https://js-draw--pr25-dev-lopwn2af.web.app/

To-do

• [x] Finish implementing scrolling toolbar carousel (design)
  • [x] Move undo/save/close to a separate line (just when there isn't enough room on the main line)
• [x] Auto-generate importable .css files from the new .scss files.
• [x] Move "Zoom"/"Format Selection" items from dropdowns to items under subheadings.
• [x] Add toolbar tests.
• [x] Update CHANGELOG.md with breaking changes.

[github-actions[bot]]

Visit the preview URL for this PR (updated for commit d47c979):

https://js-draw--pr25-dev-lopwn2af.web.app

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