Allow using refs on easyblock components

[chudesno]

This PR makes it possible to use useRef with child easyblock components.

Consider having 2 easyblock components: MyForm and MyInput. Suppose form component has to focus a child input when the button inside of the form is clicked.

This is commonly achieved through usage of useRef/forwardRef.

const MyForm = ({ MyInput, ...props }: NoCodeComponentProps) => {
  const inputRef = useRef<HTMLInputElement>(null);
  return (
    <form>
      <MyInput.type {...MyInput.props} ref={inputRef}>
        {props.label}
      </MyInput.type>
      <Button onClick={() => inputRef.current?.focus()}>Focus</Button>
    </form>
  );
};

---

However MyInput.type acrually refers to an internal easyblocks wrapper component ComponentBuilder which does not pass ref down the tree to the actual input component resolved in runtime.

To solve that, this PR wraps ComponentBuilder definition into forwardRef and passes ref down to the actual component implementation.

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