Self-serve webhook list, add, edit, remove, test, rotate-secret, deliveries

Minor Changes

• f874edd: Add user-facing releases webhook commands for self-serve /v1/me/webhooks: list, add, show, edit, remove, test, rotate-secret, and deliveries. Requires releases login (or RELEASES_API_KEY). Supports org-scoped (--org, optional --source) and follows-scoped (--scope follows) subscriptions. webhook verify remains a local, no-auth signature check. Closes buildinternet/releases-cli#320.

Patch Changes

• 1dfac19: Add --product, --type, and --clear-* filter flags to releases webhook add and webhook edit, matching per-event filters on POST/PATCH /v1/me/webhooks. Companion to buildinternet/releases#1683.