refactor: do plugin universal css agnostic

[reslear]

hi @lilianjin, i'm suggest do plugin css agnostic:

• remove tailwind classes from plugin
• add specific plugin classes like (sc-container, sc-wrapper, sc-input etc...)
• add styles to .css for vanilla css (compiled with tailwind) and importing if need [1]
• add to package.json separate exports for css files
• add instruction how to use with tailwind and well-now classes with @apply syntax [2]
• rewrite to typescript

[1]

// importing styles if need css 
import 'ofcold-security-code/styles.css'

.sc-container {
   display:flex;
   margin-left: auto;
   margin-right: auto;
}

[2]

.sc-container {
   @apply flex flex-direction ml-auto mr-auto
}

[lilianjin]

Thank you for your excellent proposal!
I will finish it in some time, and I have other things busy recently.