v0.1.0 - Local Codex chat image archiving

Initial public release of xutao-codex-image-archive.

Highlights:

• Archives pasted Codex chat images locally before temporary clipboard files disappear.
• Local only: no uploads, no external API calls.
• Supports automatic archiving through the Codex notify hook.
• Supports backfilling old recoverable sessions.
• Preserves and restores the original Codex notify command on uninstall.
• Adds bilingual README, Chinese docs, troubleshooting notes, and share copy.