fix(input-number): embed step and suffix show conflict

[hehehai]

Types of changes

• [x] New feature
• [x] Bug fix
• [x] Enhancement
• [x] Component style change
• [ ] Typescript definition change
• [x] Documentation change
• [ ] Coding style change
• [ ] Refactoring
• [ ] Test cases
• [ ] Continuous integration
• [ ] Breaking change
• [ ] Others

Background and context

Solution

How is the change tested?

Changelog

Types	Component	Changelog(CN)	Changelog(EN)	Related issues
fix	input-number	组件内嵌模式 步进器和 suffix 重叠	embed mode step and suffix overlap	-
feat	input-number	支持 Shift + Step 步数快捷键	support Shift + Step keyboard	-
feat	input-number	自定义步进器图标	custom step icons	-
feat	input-number	长按步进器触发时间设置	holds on stepper trigger time setting	-

Checklist:

• [ ] Test suite passes (npm run test)
• [ ] Provide changelog for relevant changes (e.g. bug fixes and new features) if applicable.
• [ ] Changes are submitted to the appropriate branch (e.g. features should be submitted to feature branch and others should be submitted to main branch)

Other information

❗️有点样式冲突

• [ ] feat version
• [ ] disabled style conflict

[hehehai]

• [ ] onEnter

🐝 不实现，目前可以直接使用 @keyup.enter

[hehehai]

自定义步进器按钮的样式有点冲突