Replace samples

[rstoyanchev]

The current samples in the repository depend on the Boot starter which is about to move to the Spring Boot repository, which also means that the samples need to move too. The plan is to turn them into tests spring-graphql and/or spring-graphql-test.

In addition we'll also create a getting started guide and a more advanced external sample.

[rstoyanchev]

Example scenarios to consider:

• EnableReactiveMethodSecurity docs/example for graphiql -> graphql (Same host/origin)  #252
• Provide guidance on how to set up multiple GraphQL endpoints #439
• [Sample] Could sample webmvc-websocket be provided? #473
• Add search feature to webmvc-http sample #211
• Explore support for (multiple) transactions and update documentation to provide guidance  #274

[eduanb]

This is probably part of this issue, but the current link to samples in the documentation is broken. The link here https://docs.spring.io/spring-graphql/docs/current/reference/html/#samples points to https://github.com/spring-projects/spring-graphql/tree/main/samples (broken)

[rstoyanchev]

Thanks, @eduanb. This was addressed in 0baceda already.