fix(123): add get and list hash info

[KirCute]

Description / 描述

增加从123和123_share两个驱动获取到的文件的哈希信息。

Motivation and Context / 背景

Closes #1275

How Has This Been Tested? / 测试

Checklist / 检查清单

• I have read the CONTRIBUTING document.
  我已阅读 CONTRIBUTING 文档。
• I have formatted my code with go fmt or prettier.
  我已使用 go fmt 或 prettier 格式化提交的代码。
• I have added appropriate labels to this PR (or mentioned needed labels in the description if lacking permissions).
  我已为此 PR 添加了适当的标签（如无权限或需要的标签不存在，请在描述中说明，管理员将后续处理）。
• I have requested review from relevant code authors using the "Request review" feature when applicable.
  我已在适当情况下使用"Request review"功能请求相关代码作者进行审查。
• I have updated the repository accordingly (If it’s needed).
  我已相应更新了相关仓库（若适用）。
  • OpenList-Frontend #XXXX
  • OpenList-Docs #XXXX

[Copilot]

Pull Request Overview

This PR adds hash information support to the 123 and 123_share drivers by implementing the GetHash() method to return MD5 hash information using the file's Etag field.

• Updates GetHash() method to return actual hash information instead of empty struct
• Uses the existing Etag field as the MD5 hash value for both drivers

Reviewed Changes

Copilot reviewed 2 out of 2 changed files in this pull request and generated no comments.

File	Description
drivers/123_share/types.go	Implements GetHash() to return MD5 hash info using Etag field
drivers/123/types.go	Implements GetHash() to return MD5 hash info using Etag field

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[xrgzs]

etag 我之前遇到与实际 md5 不等的情况，但为了实现跨盘秒传，且大多数情况下 etag 都等于 md5，LGTM