[RFC] Make easier configuration of basic auth

This component is supposed to help you bootstrap a project with basic auth. But it only provides a guard that supports basic authentication.

We need to add this controller and its route:

```php
public function __construct(JwtGeneratorInterface $generateJwtTokenForAuthentication, AuthenticationSuccessHandlerInterface $authenticationSuccessHandler)
{
$this->generateJwtTokenForAuthentication = $generateJwtTokenForAuthentication;
$this->authenticationSuccessHandler = $authenticationSuccessHandler;
}

public function __invoke()
{
$user = $this->getUser();

$user->setLoginAt(new \DateTimeImmutable());
$user->setToken($this->generateJwtTokenForAuthentication->create($user));

$response = $this->authenticationSuccessHandler->handleAuthenticationSuccess($user, $user->getToken());
$decodedResponse = json_decode($response->getContent(), true);
$user->setRefreshToken($decodedResponse['refresh_token']);

return $user;
}
```

This controller (and some other classes of this package) needs a JwtGenerator that the user must define. No doc about (#1) and weird errors. Here is an example of implementation.

```php
class StandardJwtGenerator implements JwtGeneratorInterface
{
/**
* @var JWTEncoderInterface
*/
private $encoder;

/**
* @var string|\DateTime
*/
private $expiration;

/**
* GenerateJwtTokenForAuthentication constructor.
*
* @param JWTEncoderInterface $encoder
*/
public function __construct(JWTEncoderInterface $encoder, $expiration = '+1 day')
{
$this->encoder = $encoder;
$this->expiration = $expiration;
}

/**
* @param UserInterface $user
*
* @return string
*/
public function create(UserInterface $user)
{
$expiration = $this->expiration;
if (!$expiration instanceof \DateTimeInterface) {
$expiration = new \DateTime($this->expiration);
}

$payload = [
'id' => $user->getId(),
'email' => $user->getEmail(),
'exp' => $expiration->getTimestamp(),
];

return $this->encoder->encode($payload);
}
}
```

Aliasing interfaces is also required:
```yaml
services:
Biig\Component\User\Jwt\JwtGeneratorInterface: '@App\Domain\User\Security\StandardJwtGenerator'
Biig\Component\User\Persistence\RepositoryInterface: '@App\Infrastructure\ORM\User\Repository\UserRepository'
```

This is a problem because it removes the possibility to have many services within the interface. It should be done via configuration and automatic creation of services.

This is absolutely not documented. And it could be added automatically by the bundle with a little line of configuration... That modifies the behavior of the guard which is a little bit too much hardcoded. See here:

https://github.com/biig-io/UserComponent/blob/43d1f8197a9cfb5bd85f64dd31e1f43bf48d80ab/src/Security/Authenticator/BasicAuthenticator.php#L121

So, to summarize here is what to do:
1. Add the given controller
2. Add a way of configuration to enable service and controller (basic auth to start)
3. Document this