Dropdown: Expose focusInputRef for React Hook Form

[melloware]

Describe the bug

Similar to #3645

When using Dropdown component with React Hook Form, on submit, if the dropdown is the only field to fail validation then React Hook Form attempts to put a focus on the Dropdown field but cannot.

Standard input text and password fields work as expected, as does a password input wrapped in a div as generated by Prime React.

Reproducer

https://codesandbox.io/s/blissful-butterfly-pc6xhk

PrimeReact version

8.7.2

React version

18.x

Language

ES6

Build / Runtime

Create React App (CRA)

Browser(s)

No response

Steps to reproduce the behavior

1. Create a react hook form with at least one PrimeReact Dropdown component (form can have other fields/inputs too).
2. Make sure the PrimeReact Dropdown component has some kind of validation - for example, field is required.
3. Fill in all fields, except for the PrimeReact Dropdown (or otherwise make this field invalid)
4. Submit the form to see e.focus / elm.focus error.

Expected behavior

With all other fields types, standard html text or password, PrimeReact InputText then when submitting the form, if there are errors the first field with an error is focused on.
I would expect that, if the PrimeReact Password component is the first invalid field then the form should focus on this field too.

[melloware]

Exposed focusInputRef so we can do this...

<Controller
	name="make"
	control={form.control}
	rules={{ required: 'Make is required.' }}
	render={({ field, fieldState }) => (
		<>
			<label htmlFor={field.name} className={classNames({ 'p-error': errors.make })}>Make*</label>
			<Dropdown
				id={field.name}
				options={manufacturers}
				className={classNames({ 'p-invalid': fieldState.error })}
				{...field}
				focusInputRef={field.ref}
			/>
			{getFormErrorMessage(fieldState, field.name)}
		</>
	)}
/>