Audit all types for whether they need `readonly` modifier

描述

贡献者指南

技术栈

typescript

领域

developer experience

议题类型

refactor

难度面向新贡献者的预计实现难度，1 表示很小改动，5 表示专家级工作。

3

预计时间有经验贡献者完成调查、实现、测试并准备 pull request 的粗略时间范围。

1-2 days

活动状态议题当前的可参与程度：新鲜、活跃、陈旧、阻塞或等待维护者输入。

blocked

清晰度议题是否清楚说明期望改动、验收标准和下一步。

clear

前置要求

TypeScriptfamiliarity with type festreadonly modifier understanding

新手友好度1-100 的估计分数，表示该议题对首次贡献者的友好程度。

50

研究方向

First, review the changes made in the similar issue #758 to understand the pattern. Then, examine all type definitions in the type fest source (likely in the 'source' directory) to identify types where a `readonly` modifier is missing but could be applied, especially for object types and arrays. Pay attention to utility types that wrap or transform objects, as they may need to preserve or add readonly constraints. Check the GitHub issue comments for any guidance from maintainers or the assignee (@Emiyaaaaa).