web-extension - Add a devtool config object to meta and use it to better present components inside the web extension

[andreaSimonePorceddu]

Is your feature request related to a problem? Please describe.
Sometimes the style of a component couldn't be enough consistent to present it in a nice way inside the web extension.

Describe the solution you'd like
In these cases, it could be needed to add an additional style to the component, in order to present it in a better way inside the web extension. We can add a devtoolConfig property inside meta to define these additional behaviours.

Example

const Flex = {
  tag: 'div',
  style: {
    display: 'flex'
  },
  meta: {
    devtoolConfig: {
      label: 'Flex Div',
      style: {
        size: '100px',
        bg: 'gray.light'
      },
      background: 'white',
    }
  }
}