Abilities REST Adapter

Abilities REST Adapter Define a WordPress Abilities API ability by reusing an existing REST API route — its schema, validation, permission check, and handler — instead of re-implementing them. The adapter dispatches the real route via restdorequest(), so the ability stays behaviorally equivalent to the endpoint. The signature mirrors core's wpregisterability( $name, $args ). route, method, label, description, and category are required. See docs/usage.md for the full guide: the five seams (inputcallback / outputcallback / inputschema / outputschema / requirepermission), collections, the write-safety rule, the permission-error limitation, and the wp ability describe-route command. - Reuse, don't re-implement. Permission is the route's real check; output is the route's real body. A collection synthesizes { items, total, totalpages } from the X-WP-Total headers. - Facilitate, don't force. The adapter gives the developer seams instead of baking in opinions: - inputcallback( array $params ): array|WPError — transform the request before dispatch (set fields, pin context, inject fixed params, reshape, or reject). - outputcallback( $data, array $input, WPRESTResponse $response ): mi