v0.1.0

• Initial release of Agent-First Mail (afmail) — a git-shaped, file-first mailbox workspace where your agent reads, triages, drafts, and files mail entirely in local files.
• Acquisition and effects are separate verbs: read-only pull imports mail into local files, while every remote effect — send, reply, archive, delete — is queued and applied only through an explicit push (a bare push previews as a dry run; push --confirm applies).
• Output follows Agent-First Data conventions — structured output, field suffixes, secret handling, and JSONL audit events.