Allowing multiple domain per config

### Use Case

In case of multiple domain you have to define multiple entries for this generator. It make a lot of semi duplicate entries when you have only one EventBridge. Also I suspect it will fetch schemas multiple times.

### Proposed Solution

Could it be possible to have a list of domains, maybe having services as domain property?

### Implementation Notes

_No response_

### Community Notes

* Please vote by adding a 👍 reaction to the issue to help us prioritize.
* If you are interested to work on this issue, please leave a comment.
* If this issue is labeled **needs-discussion**, it means the spec has not been finalized yet. Please reach out in the [EventCatalog Discord](https://discord.com/invite/3rjaZMmrAm).