Updated documentation with guidance on using virtual threads

[vyj7]

I was wondering if we have support to use virtual threads, for batch-loaders as opposed to current use?

[bclozel]

See graphql-java/graphql-java#3331

[rstoyanchev]

@vyj7 are you aware that SchemaMapping and BatchMapping methods support returning Callable that's invoked through the configured Executor, e.g. VirtualThreadTaskExecutor?

The discussion that Brian referenced would need to progress for deeper support at the level of GraphQL Java, but as it is today, you can use virtual threads.

[vyj7]

We recently migrated from java-kickstart. I have explored spring-graphql very minimal so that migration can be smooth. But this looks promising to me.
Thanks @bclozel @rstoyanchev . I will try doing it.

[rstoyanchev]

I'll update the documentation a little to make this easier to find.