feat(component): add o-alert component

[yzh990918]

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[yzh990918]

I found a strange problem 🤣, When I run pnpm build, I have exported the alert component and props, but the component declaration is not generated in the dist, After investigating for a long time, I finally located the emits here. If I delete the close event emits, it will be packaged successfully. It seems that I didn't find the problem with the code

I am a bit at a loss to solve this problem, you can pay attention to this problem when you have time 😄 @chris-zhu Thanks