Increasing the number of items returned through a relationship

### Describe the feature you'd like to request

In Gen1 we were able to adjust how many items were returned through a @connection by doing something like this: clinics(limit:500) { items { id clinicId } }. There doesn't seem to be a way to do this in Gen 2? I can set the selectionSet params like so: [clinics.*] but there is no param for the limit variable. By default, amplify will only return 100 items which is not enough in certain situations, so I would like a way to increase the limit.

### Describe the solution you'd like

Currently selectionSet is a string array. This can be changed to an object array that looks something like this:

```
selectionSet: {
key: string;
limit?: number;
}[]
```

Or maybe you can add an additional parameter to the options object that selectionSet sits inside of?

### Describe alternatives you've considered

The only alternative I have so far is to run a separate query to get the rest of the items that weren't in the original 100.

### Additional context

_No response_

### Is this something that you'd be interested in working on?

- [ ] 👋 I may be able to implement this feature request

### Would this feature include a breaking change?

- [ ] ⚠️ This feature might incur a breaking change

No files or tests are named; start by locating the Gen 2 TypeScript implementation of selectionSet and relationship fetching, then compare it with the described Gen 1 @connection limit behavior. Done means providing a documented way to configure more than the default 100 related items without requiring a separate query.

Written by the indexing model from the issue text.