feat: custom changelog

[o-az]

Using a custom changelog generator - taken from https://github.com/floating-ui/floating-ui/blob/master/.changeset/changelog.js

ref https://github.com/changesets/changesets/blob/main/docs/modifying-changelog-format.md#writing-changelog-formatting-functions

[changeset-bot]

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