add many2many relation between socialIssue and accompanying period + api endpoint

src/Bundle/ChillPersonBundle/Templating/Entity/SocialIssueRender.php

@@ -0,0 +1,50 @@
+<?php
+
+namespace Chill\PersonBundle\Templating\Entity;
+
+use Chill\MainBundle\Templating\Entity\ChillEntityRenderInterface;
+use Chill\PersonBundle\Entity\SocialWork\SocialIssue;
+use Chill\MainBundle\Templating\TranslatableStringHelper;
+
+class SocialIssueRender implements ChillEntityRenderInterface
+{
+    private TranslatableStringHelper $translatableStringHelper;
+
+    public const SEPARATOR_KEY = 'default.separator';
+
+    public const DEFAULT_ARGS = [
+       self::SEPARATOR_KEY => ' > ',
+   ];
+
+    public function __construct(TranslatableStringHelper $translatableStringHelper)
+    {
+        $this->translatableStringHelper = $translatableStringHelper;
+    }
+
+    public function supports($entity, array $options): bool
+    {
+        return $entity instanceof SocialIssueRender;
+    }
+    
+    public function renderString($socialIssue, array $options): string
+    {
+        /** @var $socialIssue SocialIssue */
+        $options = \array_merge(self::DEFAULT_ARGS, $options); 
+
+        $str = $this->translatableStringHelper->localize($socialIssue->getTitle());
+
+        while ($socialIssue->hasParent()) {
+            $socialIssue = $socialIssue->getParent();
+            $str .= $options[self::SEPARATOR_KEY].$this->translatableStringHelper->localize(
+                $socialIssue->getTitle()
+            );
+        }
+
+        return $str;
+    }
+    
+    public function renderBox($entity, array $options): string
+    {
+        return "renderBox not implemented for social issue";
+    }
+}