feat: include class content as literal type

[flowreaction]

Small POC, demonstrating how it would be possible to have the content of a class as the literal type.
The benefit here would be, that on hover over the used style class name, it would show the tooltip info with the CSS that is being applied by it.

WIP
There are still some quirks that need to be worked out.

.i {
  color: orange;

  &-am {
    &-kebab {
      color: green;
      background-color: rgb(255, 0, 0);
      
      &-cased {
        color: red;
      }

      &:hover {
        color: yellow;
      }
    }
  }
}

Would become:

export type Styles = {
  i: "color: orange;";
  "i-am-kebab": 
    `color: green;
    background-color: red;`;
  "i-am-kebab-cased": "color: red;";
  while: "color: blue;";
};

instead of:

export type Styles = {
  i: string;
  "i-am-kebab": string;
  "i-am-kebab-cased": string;
  while: string;
};