Meta annotations

[rwinch]

This PR:

• Uses switches to a single sample application

• Adds gradlew

• Add checks for GitHub actions

• Use the default web security (no need for custom configuration)

• Demonstrates the use of meta annotation support added by https://github.com/spring-projects/spring-security/issues/14480

• Instead of using @PreAuthorize directly with a complex SpEL expression

• We can use @PreOpenFgaCheck like this

• We can simplify it further by adding @PreReadDocumentCheck and using it like this

• Similar examples with PostAuthorize

[rwinch]

@jimmyjames Thanks for the feedback. I'm glad it is looking good to you.

Looking at the release schedule, looks like meta-annotations in 6.3.0 would be available in May?

Yes. It is already merged into main and the GA will be in May.