feat(import): add --transfer-owner flag

[chifan42]

Summary

• Add --transfer-owner flag to doc import command
• After import, automatically grants full_access permission to the specified user
• Optionally transfers document ownership (via --transfer-owner flag or transfer_ownership config)
• Supports specifying email directly (--transfer-owner user@example.com) or falling back to owner_email in config

Usage

# Transfer to specific email
feishu-cli doc import doc.md --title "Doc" --transfer-owner user@example.com

# Use config owner_email as fallback
feishu-cli doc import doc.md --title "Doc" --transfer-owner

# Auto-transfer via config (transfer_ownership: true)
feishu-cli doc import doc.md --title "Doc"

Test plan

• doc import doc.md --transfer-owner user@example.com — verify permission added + ownership transferred
• doc import doc.md --transfer-owner with owner_email in config — verify fallback works
• doc import doc.md with transfer_ownership: true in config — verify auto-transfer
• doc import doc.md without flag or config — verify no permission/transfer changes (backward compatible)

[riba2534]

感谢提交！\n\n关闭原因： flag 设计拆分方案合理：\n1. (bool) 控制是否启用转移\n2. (string) 指定邮箱\n\n这个拆分更适合 CLI 的语义，建议重新设计后提交。