feat(firewall) : add firewall feature to support route table egress + to enable udr

[vittoriasalim]

as title

[Copilot]

Pull request overview

This PR adds Azure Firewall support to the Terraform Azure modules, enabling users to configure firewalls with NAT, network, and application rule collections. The implementation includes a new firewall submodule with comprehensive rule configuration options and proper integration with the existing network module infrastructure.

Key Changes

• Added new firewall submodule under modules/terraform/azure/network/firewall/ with support for NAT, network, and application rule collections
• Extended variable definitions at both the top-level (modules/terraform/azure/variables.tf) and network module (modules/terraform/azure/network/variables.tf) to include firewall configuration
• Added public IP address output to support firewall IP tracking

Reviewed changes

Copilot reviewed 9 out of 9 changed files in this pull request and generated 7 comments.

Show a summary per file

File	Description
modules/terraform/azure/variables.tf	Added firewall configuration object to network_config_list with support for SKU, DNS, and rule collections
modules/terraform/azure/public-ip/output.tf	Added pip_addresses output to map public IP names to their addresses
modules/terraform/azure/network/variables.tf	Added firewall configuration to network_config with inline comments documenting valid values
modules/terraform/azure/network/output.tf	Added firewalls output to expose private IP addresses of deployed firewalls
modules/terraform/azure/network/main.tf	Integrated firewall module with for_each loop over firewall configurations
modules/terraform/azure/network/firewall/variables.tf	Defined firewall_config variable with comprehensive rule collection schemas
modules/terraform/azure/network/firewall/output.tf	Defined private_ip_address output for firewall instances
modules/terraform/azure/network/firewall/main.tf	Implemented azurerm_firewall resource with NAT, network, and application rule collections
modules/terraform/azure/network/firewall/README.md	Added documentation for the firewall module with usage examples