新增 timeline 组件

[richerfu]

🤔 这个 PR 的性质是？

• 日常 bug 修复
• 新特性提交
• 文档改进
• 演示代码改进
• 组件样式/交互改进
• CI/CD 改进
• 重构
• 代码风格优化
• 测试用例
• 分支合并
• 其他

🔗 相关 Issue

💡 需求背景和解决方案

📝 更新日志

• fix(组件名称): 处理问题或特性描述 ...

• 本条 PR 不需要纳入 Changelog

☑️ 请求合并前的自查清单

⚠️ 请自检并全部勾选全部选项。⚠️

• 文档已补充或无须补充
• 代码演示已提供或无须提供
• TypeScript 定义已补充或无须补充
• Changelog 已提供或无须提供

[github-actions]

[codecov-commenter]

Codecov Report

❌ Patch coverage is 80.00000% with 22 lines in your changes missing coverage. Please review.
✅ Project coverage is 59.91%. Comparing base (3eae14b) to head (e692cf7).
⚠️ Report is 1700 commits behind head on develop.

Files with missing lines	Patch %	Lines
src/timeline/TimelineItem.tsx	84.21%	6 Missing ⚠️
src/timeline/useAlign.ts	66.66%	5 Missing ⚠️
src/timeline/_example/layout.tsx	62.50%	3 Missing ⚠️
src/timeline/Timeline.tsx	90.47%	2 Missing ⚠️
src/timeline/defaultProps.ts	0.00%	2 Missing ⚠️
src/timeline/_example/base.tsx	75.00%	1 Missing ⚠️
src/timeline/_example/customDot.tsx	80.00%	1 Missing ⚠️
src/timeline/_example/loading.tsx	75.00%	1 Missing ⚠️
src/timeline/_example/reverse.tsx	75.00%	1 Missing ⚠️

Additional details and impacted files

@@             Coverage Diff             @@
##           develop    #1156      +/-   ##
===========================================
+ Coverage    59.88%   59.91%   +0.03%     
===========================================
  Files         1017     1030      +13     
  Lines        17807    17924     +117     
  Branches      4085     4119      +34     
===========================================
+ Hits         10663    10739      +76     
- Misses        7144     7185      +41     

☔ View full report in Codecov by Sentry.
📢 Have feedback on the report? Share it here.

🚀 New features to boost your workflow:

• ❄️ Test Analytics: Detect flaky tests, report on failures, and find test suite problems.
• 📦 JS Bundle Analysis: Save yourself from yourself by tracking and limiting bundle sizes in JS merges.