feat(drivers): add cnb_releases

[xrgzs]

增加 CNB Release 驱动

https://cnb.cool/

https://github.com/orgs/OpenListTeam/discussions/1025

TODO: 增加文档 OpenListTeam/OpenList-Docs#132

CNB 发行版非正常文件系统，存在一些无法解决的问题，请勿反馈。

1. 空仓库需要先初始化
2. Tag / Release 目录下不支持子目录
3. OpenAPI 上传返回 expires_in_sec 仅为 10 s，上传大文件会超时，超时后仍会继续上传然后返回 token 无效，因此增加了本地超时机制，达到上传接口返回的设定时间时自动停止上传，避免上传失败、浪费流量
4. 不支持 移动、复制、重命名 操作
5. 仅支持在关闭 使用Tag名称 时，通过修改 Release 的名称进行重命名

[Copilot]

Pull Request Overview

This PR introduces a new driver for CNB Releases integration, providing OpenList with the ability to manage GitHub-like releases and assets from the CNB platform. The driver enables users to browse releases as directories and manage release assets through OpenList's interface.

• Adds complete CNB Releases driver implementation with API integration
• Implements core file operations (list, upload, delete, create) with platform-specific limitations
• Includes custom timeout handling for upload operations due to CNB's short token expiration

Reviewed Changes

Copilot reviewed 5 out of 5 changed files in this pull request and generated 4 comments.

Show a summary per file

File	Description
drivers/cnb_releases/driver.go	Main driver implementation with API operations and file management
drivers/cnb_releases/types.go	Type definitions for CNB API response structures
drivers/cnb_releases/util.go	Utility functions for API requests and asset size calculations
drivers/cnb_releases/meta.go	Driver configuration and registration
drivers/all.go	Registers the new CNB Releases driver

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