release: v0.3.0

[ncimbaljevic-godaddy]

Automated release PR for v0.3.0.

[ncimbaljevic-godaddy]

Closing — superseded by #4 (0.3.1).

This PR could not be fixed in place: release-mirror.yml only ever creates a new branch and a new PR, so a failed public-lane sweep can't be re-pushed here.

Its sweeps failed for two reasons, both since fixed upstream:

• Plugin Check — WP_ENV_HOME was not propagated to the child process, so wp-env run cli targeted an environment that was never started.
• E2E (all 9 matrix jobs) — .wp-env.json was pointed at a local .zip path, which wp-env's plugins array does not accept, so activation failed with No plugins activated.

A third defect was found afterwards and is also fixed in 0.3.1: permalink rewrites were skipped whenever wp-env was already running, which made every REST spec return rest_no_route. That one would have broken this PR's E2E matrix even after the first two fixes.

0.3.1 carries all three. Please review #4 instead.