[Feature] Convert dash-case refs definition in config and HTML to camelCase

[titouanmathis]

<div data-ref="long-name-in-dash-case">...</div>

interface FooProps {
  $refs: {
    longNameInDashCase: HTMLElement;
  }
}
class Foo extends Base {
  static config = {
    name: 'Foo',
    refs: ['long-name-in-dash-case'],
  };

  mounted() {
    console.log(this.$refs.longNameInDashCase); // HTMLDivElement
  }

  onLongNameInDashCaseClick() {
    console.log('clicked on the "long-name-in-dash-case" ref');
  }
 }