Geofencing realtime response

### Is this feature request related to a new or existing Amplify category?

New category

### Is this related to another service?

AWS Amplify GEO

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

I am having an app where an user can add his address. This address will be transformed to a geo point and saved to the profile of the user.

Then other users can create geofencing areas of events that take place. As soon as the apps starts I want to send the geo point from the profile and receive all events where the geo point fits in the geofence of the event.

Now this can be done in a way like starting the app. Send the geopoint via the SDK to BatchEvaluateGeofences. This will create an event to eventbridge which you can listen to.

### Describe the solution you'd like

I just want an api where I can send a geo point and the retrieve all geofence id's where the geo point is within the geofences.
Just in realtime and not via eventbridge

### Describe alternatives you've considered

none

### Additional context

_No response_

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

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

### Would this feature include a breaking change?

- [ ] ⚠️ This feature might incur a breaking change

Review the existing AWS Amplify GEO integration and the BatchEvaluateGeofences flow described in the issue. Determine the appropriate API entry point and service behavior for synchronous point-in-geofence lookup; done means the API returns all matching geofence IDs without relying on EventBridge.

Written by the indexing model from the issue text.