[Feature request]增加单元格格式

描述

贡献者指南

技术栈

javascript

领域

frontend

议题类型

feature

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。

1-3 hours

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。

fresh

清晰度议题是否清楚说明期望改动、验收标准和下一步。

mostly clear

前置要求

Basic JavaScriptFamiliarity with Luckysheet cell format system

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。

70

研究方向

Explore the existing cell format implementation in Luckysheet, likely in the source code under src or similar. Find how other number formats (like currency, percentage) are defined and rendered. Add a new format for Chinese uppercase numbers by following the same pattern. Look for files related to cell formatting, possibly in the 'format' or 'cell' directories. Since no comments or linked PRs exist, the approach is to understand the codebase and implement the feature incrementally.