Migrate Modal & Drawer to use CloseButton component from core

[josemarluedke]

For the close button to work correctly, it's necessary to set up the @frontile/core tailwind plugin.

// tailwind.config.js

module.exports = {
  theme: {
    // ...
  },
  plugins: [
    require('@frontile/core/tailwind'),
    require('@frontile/overlays/tailwind')
  ]
};