Update to changesets v3 beta

[bluwy]

dogfooding, similar to changesets/format repo

[socket-security]

Review the following changes in direct dependencies. Learn more about Socket for GitHub.

Diff	Package	Supply Chain Security	Vulnerability	Quality	Maintenance	License
	@​changesets/​changelog-github@​1.0.0-next.5
	@​types/​node@​25.9.3
	oxfmt@​0.54.0
	tsdown@​0.22.2
	oxlint@​1.69.0
	@​changesets/​cli@​3.0.0-next.5

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[Andarist]

I think I'd wait with this just a moment - just so we don't have to followup with another PR refactoring the setup.

[bluwy]

What do we need to follow up refactoring? Even if changesets v3 gets a stable release, I'd wait for the 7 day period so we don't have to do the excludes stuff.

If we don't want to bump the deps now we can close this (don't really mind)

[bluwy]

Let's close this for now

[Andarist]

What do we need to follow up refactoring?

I just thought it would be nice to have the CLI upgrade done when the split publishing lands, then we could also benefit from changesets/action#656