retake v0.1.0

Added

• record, replay and auto modes, with or without a wrapped command.
• Proxying for OpenAI and Anthropic out of the box, plus any upstream via --upstream NAME=URL.
• Byte-identical replay of server-sent event streams, with optional --timing realtime.
• Request matching that ignores JSON key order and formatting, with --ignore for volatile fields.
• Per-request cassettes via the x-retake-session header.
• Unified diff against the closest recording when a replayed request doesn't match.
• Secret redaction in cassettes; request headers are never stored.
• retake check [--fix] to validate cassettes and scan for leaked secrets.
• Install scripts, a GitHub Action, and prebuilt binaries for Linux, macOS and Windows.