feat: 4.0 danger button

[ycjcl868]

• search icon Button show tooltip search
• remove Button group demo
• remove Button dashed ghost demo
• tweak form-demo-advanced-demo collapse and icon position
• remove Button icon loading demo
• add Button danger, deprecated type="danger"
• remove Table actions demo Divider, using margin 16px instead.

🤔 This is a ...

• New feature
• Bug fix
• Site / document update
• Component style update
• TypeScript definition update
• Refactoring
• Code style optimization
• Test Case
• Branch merge
• Other (about what?)

🔗 Related issue link

💡 Background and solution

📝 Changelog

Language	Changelog
🇺🇸 English
🇨🇳 Chinese

☑️ Self Check before Merge

• Doc is updated/provided or not needed
• Demo is updated/provided or not needed
• TypeScript definition is updated/provided or not needed
• Changelog is provided or not needed

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View rendered components/button/demo/button-group.md
View rendered components/button/demo/ghost.md
View rendered components/button/demo/icon.md
View rendered components/form/demo/form-context.md

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[codecov]

Codecov Report

Merging #19837 into 4.0-prepare will not change coverage.
The diff coverage is n/a.

@@             Coverage Diff              @@
##           4.0-prepare   #19837   +/-   ##
============================================
  Coverage        97.55%   97.55%           
============================================
  Files              292      292           
  Lines             7210     7210           
  Branches          1994     1956   -38     
============================================
  Hits              7034     7034           
  Misses             176      176

Impacted Files	Coverage Δ
components/button/button.tsx	100% <ø> (ø)	⬆️

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[ycjcl868]

/rebase

[buildsize]

File name	Previous Size	New Size	Change
package-lock.json	977.33 KB	978.06 KB	750 bytes (0%)

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[ycjcl868]

有点问题