fix: register zip split-volume mimetypes for consistent icon display

[pengfeixx]

修复内容

在 src/assets/mimetype/deepin-compressor.xml 中新增 application/zip mime-type 注册，覆盖 zip 分卷扩展名，绑定 generic-icon name="deepin-compressor"，与现有 application/x-7z-compressed 处理方式对齐。

问题原因

deepin-compressor.xml 仅注册了 application/x-7z-compressed（glob *.7z.* + generic-icon），故 7z 分卷各分片图标一致；但 zip 分卷扩展名（*.z01、*.zip.001 等）完全未注册，文管/gio 对这些分片回退到 application/octet-stream → 未知图标，与主 .zip 不一致。

修复方案

<mime-type type="application/zip">
    <generic-icon name="deepin-compressor"/>
    <glob pattern="*.z[0-9][0-9]"/>
    <glob pattern="*.zip.[0-9][0-9][0-9]"/>
</mime-type>

• *.z[0-9][0-9]：覆盖 WinZip 风格分卷（如 xxx.z01），默认 weight 50，系统 *.z64（literal glob）同 weight 优先级更高，不受影响
• *.zip.[0-9][0-9][0-9]：覆盖通用分卷风格（如 xxx.zip.001）
• generic-icon name="deepin-compressor"：与 7z 一致，覆盖系统默认 package-x-generic

影响范围

仅修改 mime-type 注册 XML（+5 行），无 C++/CMake 代码变更，不影响应用内 mimetype 检测逻辑。

Log: PMS 268375

Summary by Sourcery

Bug Fixes:

• Register ZIP split-volume extensions as application/zip files so their icons consistently use deepin-compressor instead of unknown-file icons.

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[deepin-ci-robot]

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This pull-request has been approved by: pengfeixx

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[sourcery-ai]

Reviewer's guide (collapsed on small PRs)

Reviewer's Guide

Registers split-volume ZIP mimetypes in deepin-compressor’s MIME XML so that ZIP volume parts share the same compressor icon as the main archive, aligning behavior with existing 7z handling.

File-Level Changes

Change	Details	Files
Register application/zip split-volume patterns with the deepin-compressor generic icon to align ZIP volume icons with 7z handling.	Add a new mime-type block for application/zip in the MIME registration XML. Bind the application/zip mime-type to the deepin-compressor generic icon so ZIP files and their split volumes show the compressor icon. Register WinZip-style ZIP volume patterns (.z[0-9][0-9]) so they resolve to application/zip instead of falling back to application/octet-stream. Register generic split ZIP volume patterns (.zip.[0-9][0-9][0-9]) to ensure all common ZIP parts share the same MIME type and icon.	src/assets/mimetype/deepin-compressor.xml

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