Consume the queued changesets and cut the 0.1.0 launch release.

This is a deliberate minor bump from 0.0.x to 0.1.0 for the public launch.
The repo's pre-1.0 patch-only guard (scripts/check-changesets.mjs) is left
intact: no minor/major changeset is authored (which the guard forbids); the
queued patch changesets are consumed for changelogs and the version is set to
0.1.0 directly, since the 0.1.0 launch line is a deliberate release decision
rather than a changeset-derived bump.

All publishable packages (core, cli, build, and the seven theme-* packages)
move to 0.1.0 in lockstep via the changeset fixed group. The daily, brutalist,
and default themes were removed ahead of this release, so they are not
versioned or published at 0.1.0. Internal dependency pins are updated to match.