update readme

Author: cristoforocervino

README.md

@@ -120,6 +120,75 @@ If you add the `--no-interaction` option when running the command, it will submi
 
 If the submitted data is invalid the command will fail.
 
+
+## Using simpler forms with custom names
+
+```php
+<?php
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Input\InputOption;
+use Symfony\Component\Console\Output\OutputInterface;
+use Symfony\Component\Form\Extension\Core\Type\ChoiceType;
+use Matthias\SymfonyConsoleForm\Console\Helper\FormHelper;
+
+class TestCommand extends Command
+{
+    protected function configure()
+    {
+        $this->setName('form:demo');
+        $this->addOption('custom-option', null, InputOption::VALUE_OPTIONAL, 'Your custom option', 'option1')
+    }
+
+    protected function execute(InputInterface $input, OutputInterface $output)
+    {
+        $formHelper = $this->getHelper('form');
+        /** @var FormHelper $formHelper */
+
+        $formData = $formHelper->interactUsingNamedForm('custom-option', ChoiceType::class, $input, $output, [
+            'label' => 'Your label',
+            'help' => 'Additional information to help the interaction',
+            'choices' => [
+                'Default value label' => 'option1',
+                'Another value Label' => 'option2',
+            ]
+        ]);
+
+        // $formData will be "option1" or "option2" and option "--custom-option" will be used as default value
+        ...
+    }
+}
+```
+
+## Nested Forms
+
+If you have a complex compound form, you can define options and reference form children using square brackets:
+
+```php
+<?php
+
+use Symfony\Component\Console\Command\Command;
+use Symfony\Component\Console\Input\InputInterface;
+use Symfony\Component\Console\Output\OutputInterface;
+use Matthias\SymfonyConsoleForm\Console\Helper\FormHelper;
+
+class TestCommand extends Command
+{
+    protected function configure()
+    {
+        $this
+            ->addOption('user[username]', null, InputOption::VALUE_OPTIONAL)
+            ->addOption('user[email]', null, InputOption::VALUE_OPTIONAL)
+            ->addOption('user[address][street]', null, InputOption::VALUE_OPTIONAL)
+            ->addOption('user[address][city]', null, InputOption::VALUE_OPTIONAL)
+            ->addOption('acceptTerms', null, InputOption::VALUE_OPTIONAL)
+        ;
+    }
+    ...
+}
+```
+
 # TODO
 
 - Maybe: provide a way to submit a form at once, possibly using a JSON-encoded array