[Module Proposal]: `avm-res-network-expressrouteport`

### Check for previous/existing GitHub issues/module proposals

- [x] I have checked for previous/existing GitHub issues/module proposals.

### Check this module doesn't already exist in the module indexes

- [x] I have checked for that this module doesn't already exist in the module indexes.

### Bicep or Terraform?

Terraform

### Module Classification?

Resource Module

### Module Name

terraform-avm-res-network-expressrouteport

### Module Details

Deployment of ExpressRoute Direct resources

Azure Resource Reference: https://learn.microsoft.com/en-us/azure/templates/microsoft.network/expressrouteports?pivots=deployment-language-terraform

### Do you want to be the owner of this module?

Yes

### Module Owner's GitHub Username (handle)

_No response_

### (Optional) Secondary Module Owner's GitHub Username (handle)

_No response_