Add Virtual WAN module (#42)

modules/virtual-wan/CHANGELOG.md

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+# Changelog

modules/virtual-wan/README.md

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+# Virtual WAN
+
+This module creates a [Virtual WAN](https://registry.terraform.io/providers/hashicorp/azurerm/latest/docs/resources/virtual_wan).
+
+## Usage
+
+```hcl
+module "virtual_wan" {
+  source = "https://github.com/gofrontier-com/azurerm-terraform-modules/releases/download/virtual-wan/[VERSION]/module.tar.gz//src"
+
+  environment         = "con"
+  identifier          = "main"
+  location            = "uksouth"
+  resource_group_name = module.resource_group.name
+  zone                = "pla"
+
+  tags = {
+    WorkloadType = "PlatformLZ/virtual-wan"
+  }
+}
+```
+
+## Known issues
+
+_None._
+
+## Contributing
+
+See <https://github.com/gofrontier-com/azurerm-terraform-modules/blob/main/README.rst#contributing>.

modules/virtual-wan/VERSION

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+1.0

modules/virtual-wan/src/locals.tf

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+locals {
+  identifier = replace(lower(var.identifier), "/[^a-z1-9]/", "")
+
+  short_locations = {
+    "uksouth" = "uks"
+    "ukwest"  = "ukw"
+  }
+
+  tags = {
+    Environment = var.environment
+    Location    = var.location
+    Zone        = var.zone
+  }
+}

modules/virtual-wan/src/main.tf

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+resource "azurerm_virtual_wan" "main" {
+  name                = "vwan-${var.zone}-${var.environment}-${lookup(local.short_locations, var.location)}-${local.identifier}"
+  resource_group_name = var.resource_group_name
+  location            = var.location
+
+  tags = merge(var.tags, local.tags)
+}

modules/virtual-wan/src/outputs.tf

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+output "id" {
+  value = azurerm_virtual_wan.main.id
+}
+
+output "name" {
+  value = azurerm_virtual_wan.main.name
+}

modules/virtual-wan/src/variables.tf

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+variable "environment" {
+  type = string
+}
+
+variable "identifier" {
+  type = string
+}
+
+variable "location" {
+  type = string
+}
+
+variable "resource_group_name" {
+  type = string
+}
+
+variable "tags" {
+  type    = map(string)
+  default = {}
+}
+
+variable "zone" {
+  type = string
+}

modules/virtual-wan/test/main.tf

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+provider "azurerm" {
+  features {}
+}
+
+module "virtual_wan" {
+  source = "../src"
+
+  environment         = "bar"
+  identifier          = "baz"
+  location            = "uksouth"
+  resource_group_name = "baz"
+  zone                = "bat"
+
+  tags = {
+    Foo = "Bar"
+  }
+}

modules/virtual-wan/test/terraform.tf

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+terraform {
+  required_version = "~> 1.5"
+
+  required_providers {
+    azurerm = {
+      source  = "hashicorp/azurerm"
+      version = "~> 3.85"
+    }
+  }
+}