[symfony/mercure-bundle] Allow FrankenPHP's built-in Mercure to be used by default

[7-zete-7]

Starting with FrankenPHP 1.10.0, support for direct interaction with FrankenPHP's built-in Mercure was introduced via the mercure_publish() function.
In symfony/mercure-bundle, FrankenPHP's built-in Mercure is used if mercure.url is not specified (see https://github.com/symfony/mercure-bundle/blob/28e75026cbc494613e0b56a1ddb01cf45b4bfc8f/src/DependencyInjection/Configuration.php#L44-L46).

It would be nice to have this new way of interacting with FrankenPHP's built-in Mercure out of the box (when using Symfony Flex, of course).

[nicolas-grekas]

Why opening this issue on this repo? It looks more fitted for the mercure-bundle one, isn't it?

[7-zete-7]

Hi @nicolas-grekas!

I created this issue here because the problem currently, as far as I understand, is only with the configuration provided by this repository. So, it seemed logical to me to create an issue about the configuration here.

The described feature is already implemented in the symfony/mercure-bundle repository.

I'll move this issue to the symfony/mercure-bundle repository if you think it's more appropriate for describing this problem.

[nicolas-grekas]

If it's only a config issue, then please submit a PR here. If there's no way to patch recipes to achieve what you describe, then the issue on the bundle should explain what's missing.

[7-zete-7]

I've added a PR to address the issue described in this issue #1514.