Relay support discontinued?

### Versions

Hello! First of all - thanks for the amazing work in everything ash-related. Mind-blowing stuff.

I'm looking into building a relay-compatible graphql API, but I can't manage to get it working. The documentation mentions `relay? true` being available in resources, but I get a compilation errors. Has that been deprecated?

In short, I can't seem to be able to do what's mentioned here:

https://github.com/ash-project/ash_graphql/blob/v1.7.17/documentation/topics/relay.md

Thanks!

### Operating system

devcontainer (with alpine)

### Current Behavior

_No response_

### Reproduction

Something like this:

```
graphql do
relay? true
type :foo
end
```

Results in:

```
undefined function relay?/1 (there is no such import)
```

### Expected Behavior

`relay? true` compiles.

Start with documentation/topics/relay.md at the referenced v1.7.17 revision, then run the reported graphql block and inspect the current resource DSL around relay? support. Confirm whether the option is still supported or deprecated, and update the documentation or reported behavior so the documented example and compiler result agree.

Written by the indexing model from the issue text.