[person] Feature: add a person's center history

The association between Person and Center is now stored in a dedicated
Entity: `PersonCenterHistory`, which have a date interval (start date
and endDate). The SQL counterpart is a table, with a constraint which
ensure that no person might be associated with two center at the same time.

For ease, a view is created to get the current center associated with
the person.

The dedicated migration creates also:

* indexes for a rapid search for person at current date;
* and populate the table from current data, setting the startdate to the
  person's creation date and time if any, `NOW()` unless.

The `Person` entity is also updated to use the information from the
PersonCenterHistory classes, but this commit does not yet delete the
`Center` column.

src/Bundle/ChillPersonBundle/Repository/Person/PersonCenterHistoryInterface.php

@@ -0,0 +1,10 @@
+<?php
+
+namespace Chill\PersonBundle\Repository\Person;
+
+use Doctrine\Persistence\ObjectRepository;
+
+interface PersonCenterHistoryInterface extends ObjectRepository
+{
+
+}

src/Bundle/ChillPersonBundle/Repository/Person/PersonCenterHistoryRepository.php

@@ -0,0 +1,48 @@
+<?php
+
+namespace Chill\PersonBundle\Repository\Person;
+
+use Chill\PersonBundle\Entity\Person\PersonCenterHistory;
+use Doctrine\ORM\EntityManagerInterface;
+use Doctrine\ORM\EntityRepository;
+
+class PersonCenterHistoryRepository implements PersonCenterHistoryInterface
+{
+    private EntityRepository $repository;
+
+    public function __construct(EntityManagerInterface $em)
+    {
+        $this->repository = $em->getRepository($this->getClassName());
+    }
+
+    public function find($id): ?PersonCenterHistory
+    {
+        return $this->repository->find($id);
+    }
+
+    /**
+     * @return array|PersonCenterHistory[]
+     */
+    public function findAll(): array
+    {
+        return $this->repository->findAll();
+    }
+
+    /**
+     * @return array|PersonCenterHistory[]
+     */
+    public function findBy(array $criteria, ?array $orderBy = null, ?int $limit = null, ?int $offset = null): array
+    {
+        return $this->repository->findBy($criteria, $orderBy, $limit, $offset);
+    }
+
+    public function findOneBy(array $criteria): ?PersonCenterHistory
+    {
+        return $this->repository->findOneBy($criteria);
+    }
+
+    public function getClassName(): string
+    {
+        return PersonCenterHistory::class;
+    }
+}