style(table): table style and popconfirm demo style

[zhangpaopao0609]

🤔 这个 PR 的性质是？

• 组件样式/交互改进

🔗 相关 Issue

组件【Popconfirm 气泡确认框】样式优化: Tencent/tdesign#191
组件【Table 表格】样式优化: Tencent/tdesign#189

💡 需求背景和解决方案

样式优化

📝 更新日志

• style(Table): Table 以及 Popconfirm 样式优化

• 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

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 43.38%. Comparing base (492d477) to head (63385c4).
⚠️ Report is 1117 commits behind head on develop.

Additional details and impacted files

@@             Coverage Diff              @@
##           develop    #1388       +/-   ##
============================================
- Coverage    57.94%   43.38%   -14.57%     
============================================
  Files          407      759      +352     
  Lines        15371    20817     +5446     
  Branches      2931     2966       +35     
============================================
+ Hits          8907     9031      +124     
- Misses        6187    11506     +5319     
- Partials       277      280        +3     

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