feat: custom cursor

[xiaoxustudio]

issue: #975

支持：.ani，.cur，png,svg等格式文件

Custom_Corsur:<路径>[,类型,x,y];

自定义鼠标光标

具体类型在https://developer.mozilla.org/zh-CN/docs/Web/CSS/Reference/Properties/cursor

各个属性使用英文逗号分割。同时也同样支持设置多个鼠标状态，使用空格分割即可

Custom_Corsur_Ani_Size:<X> <Y>;

当使用ani文件时，可以设置大小

PS：
建议设置为32x32
https://developer.mozilla.org/en-US/docs/Web/CSS/Reference/Properties/cursor#icon_size_limits

预览：

[gemini-code-assist]

Code Review

This pull request adds support for custom cursors via the Custom_Corsur command, introducing the ani-cursor.js dependency to handle .ani files. Feedback on the implementation identifies a path resolution bug where the /game/ prefix is omitted for non-.ani cursors, a potential CSS injection vulnerability due to inserting unescaped values into a <style> element's innerHTML, and missing safety checks for parseInt results. A secure, refactored implementation is suggested to resolve these issues.

Important

The consumer version of Gemini Code Assist on GitHub is being sunset. Starting June 18, 2026, new organization installations will be blocked, and all code review activity will officially cease on July 17, 2026.
For more details on the timeline and next steps, please review the Help Documentation.

[xiaoxustudio]

目前使用的是ani-cursor.js库，但原库似乎存在很多问题，如类型、不支持设置自定义热点坐标，查看原作者是否还在维护项目，如果没有维护可能会考虑fork原库后单独维护

已更新依赖

[xiaoxustudio]

目前还有些特性未实现，考虑是否可以实现，如果无法实现，则放弃并保留基础自定义功能
新功能可以新开pr