Consolidate graphqlite-symfony-validator-bridge into graphqlite-bundle

[Lappihuan]

@andrew-demb Big thanks for unblocking the dependency hell this package and graphqlite-bundle were in!

To avoid similar issues in the future, we should reduce complexity and friction for updates.
I propose consolidating graphqlite-symfony-validator-bridge into the graphqlite-bundle. We can make symfony/validation a suggested dependency and throw an exception if validation attributes are used without it.

[andrew-demb]

It means that we won't allow using symfony/validator bindings without symfony/http-kernel and other dependencies.

I'm OK with it because I don't know how many library consumers don't use Symfony as a framework.

[Lappihuan]

Ah, I hadn’t considered that use case. That might actually be the main reason it was separated initially.

[oojacoboo]

I don't really know what this lib does outside of Symfony framework. But #63 was added so that Symfony validator can hook into annotated Input types for validation. And it's very simple to setup. So, there shouldn't be any concerns about people being able to use the Symfony validator outside the framework.

[Lappihuan]

Right, I forgot about that.
Alternatively, we could fully integrate InputTypeValidation into the graphqlite-bundle and archive this repo if it no longer serves a purpose.

[oojacoboo]

@Lappihuan I would do that. We have one class that handles all our Symfony validator logic for all our input types. It's very simple. I just don't know why this lib is needed, personally. But again, we don't use the framework.