\nMerge queue test 2 (DiluxOne/.github#451).
A toy WordPress plugin where DiluxOne's shared workflows are proved end to end (DiluxOne/.github#287, item 12) before a version of them reaches a real plugin. Nothing here is published: its release runs as a rehearsal.
make pre-pr runs what CI runs.
Merge queue test 1 (DiluxOne/.github#451).