feat: Require confirmation when opening survival saves.

[lovexyn0827]

Description/描述

添加了一个在尝试打开生存存档时显示的确认界面，以防止玩家意外地打开生存存档。

Added a confirmation screen displayed when attempting to open survival save, to prevent survival saves from being opened accidentally.

Related Issues/相关的 issue

无

None

Checklist/清单

• [N/A] The issues this PR addresses are related to each other/此 PR 解决的 issue 是相关的
• [N/A ] My changes are all related to the related issue above/我的修改都与上方的相关 issue 有关
• [x] My changes generate no new warnings/我的修改没有产生新的警告
• [x] My code builds and runs on my machine/我的代码在我的电脑上可以编译和运行
• [x] I documented my code/我已经为我的代码添加了注释/文档

Screenshots