test: add network template tests

tests/network/variables.pkr.hcl

@@ -0,0 +1,34 @@
+variable "vm_network_device" {
+  type        = string
+  description = "The network device of the VM."
+  default     = "eth0"
+}
+
+variable "vm_ip_address" {
+  type        = string
+  description = "The IP address of the VM (e.g. 172.16.100.192)."
+  default     = null
+}
+
+variable "vm_ip_netmask" {
+  type        = number
+  description = "The netmask of the VM (e.g. 24)."
+  default     = null
+}
+
+variable "vm_ip_gateway" {
+  type        = string
+  description = "The gateway of the VM (e.g. 172.16.100.1)."
+  default     = null
+}
+
+variable "vm_dns_list" {
+  type        = list(string)
+  description = "The nameservers of the VM."
+  default     = []
+}
+
+variable "output_folder" {
+  type        = string
+  description = "The output folder for the generated files."
+}