Add Support for something like adding custom routes to the route tables created by AFT. #591
Description
Describe the outcome you'd like
I would like to be able to configure custom routes to the route tables created by AFT for my CodeConnections host.
Is your feature request related to a problem you are currently experiencing? If so, please describe.
In our case, we connect with our GitLab instance over a VPC Peering connection, so currently we need to add these routes manually outside terraform state, would be great to be able to add this.
Additional context
Add any other context or screenshots about the feature request here.