Allow messages (command, queries and events) to belong to a domain (without a service)

[boyney123]

Use Case

Speaking with a few users (@MathiasEurostar) of EventCatalog, they expressed it would be nice to have (mainly events) messages part of their domain.

The way I see this working in that domains could also have a events queries and commands section on the domain (optional ofc), if they are present then the catalog would associate that event to that domain (without a service).

We would have to add functions to getMessagesByDomain which would also have to traverse the services if any are in the service to get their messages too.

Proposed Solution

---
id: Payment
name: Payment
version: 0.0.1
summary: |
  Domain that contains payment related services and messages.
owners:
    - dboyne
events:
  - id: InventoryAdjusted
     version: 1.0.0 
badges:
    - content: Payment Domain
      backgroundColor: blue
      textColor: blue
---

## Overview

The Payment Domain encompasses all services and components related to handling financial transactions within the system. It is responsible for managing payments, transactions, billing, and financial records. The domain ensures secure, reliable, and efficient processing of all payment-related activities

## Bounded context

<NodeGraph />

No response

Implementation Notes

No response

Community Notes

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[boyney123]

Also add events/commands/queries in this view

[boyney123]

Think we should also extend the SDK to support adding events to domains etc.

[carlosallexandre]

Related #1046