Review (via AI-assisted code review): REQUEST CHANGES

This PR is not mergeable in its current form.

• 305 changed files, +10,329 lines: the bulk of the diff is checked-in build output under packages/quill/dist/ (LICENSE, README, .styl sources, SVG icons, compiled assets), plus a .gitignore edit. Committing generated dist artifacts contradicts the repo's own ignore rules and would pollute every future diff and release tarball.
• The PR has no description and the title ("Softbreak test") plus branch name indicate this is an experiment, not a reviewed change. There is no explanation of what soft-break behavior is being changed or why.
• With 31 commits touching hundreds of files, it is impossible to isolate or verify any actual source change that may be buried in here.

If there is a real soft-break fix in this branch, please open a new PR containing only the relevant source changes (no dist/), with a description of the bug, the fix, and tests. Closing this one seems appropriate.