Add title prefix support to component blocks.

[haringsrob]

This pr allows component blocks to set the title prefix and title field:

<?php

namespace App\View\Components\Twill\Blocks;

use A17\Twill\Services\Forms\Fields\BlockEditor;
use A17\Twill\Services\Forms\Fields\Wysiwyg;
use A17\Twill\Services\Forms\Form;
use A17\Twill\Services\Forms\Fields\Input;
use A17\Twill\View\Components\Blocks\TwillBlockComponent;
use Illuminate\Contracts\View\View;

class Demo extends TwillBlockComponent
{
    public static function getBlockTitleField(): ?string
    {
        return 'title';
    }

    public static function shouldHidePrefix(): bool {
        return true;
    }

    public function getForm(): Form
    {
        return Form::make([
            Input::make()->name('title'),
            Wysiwyg::make()->name('text'),
            BlockEditor::make()->name('left')
        ]);
    }

    public function render(): View
    {
        return view('components.twill.blocks.demo');
    }

}

[haringsrob]

@ifox I removed the block argument from the getTitle because that was the intended purpose but that could never work.