feat(123_open): add DirectLink option

[xrgzs]

增加 使用直链 开关，启用后，返回 CDN 直链，会消耗直链流量。需要先启用直链空间。

https://123yunpan.yuque.com/org-wiki-123yunpan-muaork/cr6ced/tdxfsmtemp4gu4o2

已知问题：

• 需要用户手动启用直链空间，由于涉及到篡改用户设置，这里不考虑自动处理
• 未实现直链URL鉴权，正在处理 已实现

Close: #1043

TODO: 增加文档 OpenListTeam/OpenList-Docs#134

[Copilot]

Pull Request Overview

This PR adds a UseDirectLink option to the 123_open driver that allows users to return CDN direct links instead of regular download URLs, which will consume direct link traffic. The feature requires users to manually enable direct link space first.

Key changes:

• Added direct link configuration options with optional URL authentication
• Implemented direct link API endpoint and response handling
• Modified the Link method to support both direct link and traditional download modes

Reviewed Changes

Copilot reviewed 4 out of 4 changed files in this pull request and generated 3 comments.

File	Description
drivers/123_open/meta.go	Added configuration fields for direct link feature including private key and validation duration
drivers/123_open/types.go	Added DirectLinkResp struct and changed UID type from int64 to uint64
drivers/123_open/util.go	Added direct link API endpoint, URL signing method, and getDirectLink function
drivers/123_open/driver.go	Modified Link method to conditionally use direct links with authentication support

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[liufurusu]

123分享，可以像豆包一样一行一个目录吗。现在需要每个分享链接创建一个驱动

[xrgzs]

123分享，可以像豆包一样一行一个目录吗。现在需要每个分享链接创建一个驱动

目前123open未实现分享，另外请到合适的地方反馈

[Keither666]

万岁，测试版能用上了