Secrets API v0.3.0

Secrets API v0.2.3

Secrets API v0.2.2

Secrets API v0.2.1

Secrets API v0.2.0

Secrets API v0.1.0

First release of the feature plugin implementing the Secrets API proposed
for WordPress 7.2.

Encrypted, versioned credential storage with a pluggable provider model.
Everything under src/ is written to be copied into wordpress-develop
unchanged.

455 tests green on PHP 7.4, 8.0 and 8.3 against WordPress latest and trunk,
plus multisite.