Add macOS/Docker tools for Apple integration, OCR, and self-hosted cloud

[liketheduck]

Summary

Adds 5 tools for Supernote integration with the Apple ecosystem and self-hosting:

• supernote-apple-note-unifier: Mirror Apple Notes to Supernote as .note files
• supernote-apple-reminders-sync: Bidirectional sync with Apple Reminders on macOS
• supernote-koreader-harmonizer: Sync KOReader highlights to Supernote Digest
• supernote-ocr-enhancer: Local OCR enhancement using Apple Vision Framework (injects OCR back into .note files with word-level bounding boxes)
• supernote-private-cloud-docker: Self-hosted Private Cloud replacement with Docker Compose, HTTPS, and email support

All require developer skills, consistent with existing Tools section entries.

[github-actions]

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[fharper]

Thanks for your contribution @liketheduck 🎉