feat(tabs): panel 支持 className 透传

[honkinglin]

🤔 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

[codecov-commenter]

Codecov Report

Merging #763 (e2c7cc1) into develop (769dcd1) will decrease coverage by 3.05%.
The diff coverage is 37.61%.

@@             Coverage Diff             @@
##           develop     #763      +/-   ##
===========================================
- Coverage    64.33%   61.27%   -3.06%     
===========================================
  Files          725      853     +128     
  Lines        12647    15335    +2688     
  Branches      3025     3629     +604     
===========================================
+ Hits          8136     9397    +1261     
- Misses        4511     5938    +1427     

Impacted Files	Coverage Δ
src/alert/_usage/index.jsx	0.00% <0.00%> (ø)
src/anchor/_usage/index.jsx	0.00% <0.00%> (ø)
src/avatar/_usage/index.jsx	0.00% <0.00%> (ø)
src/badge/_usage/index.jsx	0.00% <0.00%> (ø)
src/button/_usage/index.jsx	0.00% <0.00%> (ø)
src/calendar/_example/cell-append.jsx	88.88% <ø> (ø)
src/calendar/_example/cell.jsx	92.85% <ø> (ø)
src/calendar/_example/slot-props-api.jsx	94.73% <ø> (ø)
src/calendar/_usage/index.jsx	0.00% <0.00%> (ø)
src/cascader/_usage/index.jsx	0.00% <0.00%> (ø)
... and 300 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update c05508a...e2c7cc1. Read the comment docs.

[github-actions]

[github-actions]

Size Change: +8 B (0%)

Total Size: 762 kB

Filename	Size	Change
./dist/tdesign.js	457 kB	+4 B (0%)
./dist/tdesign.min.js	219 kB	+4 B (0%)

ℹ️ View Unchanged

Filename	Size
./dist/tdesign.css	45.7 kB
./dist/tdesign.min.css	40.7 kB