feat: Add Packer build automation scripts

- Added packer/variables.pkr.hcl with configurable variables
- Added build-template.sh with interactive build script
- Added .env.example for environment configuration
- Updated windows.pkr.hcl to use variables
- Supports environment variables and command line arguments

packer/variables.pkr.hcl

@@ -0,0 +1,79 @@
+variable "proxmox_url" {
+  type        = string
+  default     = "https://la-vmh-07:8006/api2/json"
+  description = "Proxmox API URL"
+}
+
+variable "proxmox_username" {
+  type        = string
+  default     = "root@pam"
+  description = "Proxmox authentication user"
+}
+
+variable "proxmox_password" {
+  type        = string
+  default     = ""
+  description = "Proxmox password (set via PKR_VAR_proxmox_password env var)"
+  sensitive   = true
+}
+
+variable "proxmox_node" {
+  type        = string
+  default     = "la-vmh-07"
+  description = "Proxmox node name"
+}
+
+variable "vm_name" {
+  type        = string
+  default     = "win11-ltsc-template"
+  description = "Name of the template VM"
+}
+
+variable "vm_memory" {
+  type        = number
+  default     = 8192
+  description = "VM memory in MB"
+}
+
+variable "vm_cores" {
+  type        = number
+  default     = 4
+  description = "Number of CPU cores"
+}
+
+variable "vm_disk_size" {
+  type        = string
+  default     = "60G"
+  description = "Disk size"
+}
+
+variable "iso_storage" {
+  type        = string
+  default     = "local"
+  description = "Proxmox storage for ISOs"
+}
+
+variable "windows_iso" {
+  type        = string
+  default     = "CLIENT_LTSC_EVAL_x64FRE_en-us.iso"
+  description = "Windows ISO filename"
+}
+
+variable "disk_storage" {
+  type        = string
+  default     = "local-lvm"
+  description = "Proxmox storage for disks"
+}
+
+variable "virtio_iso" {
+  type        = string
+  default     = "local:iso/virtio-win.iso"
+  description = "Path to VirtIO ISO"
+}
+
+variable "winrm_password" {
+  type        = string
+  default     = "PackerPassword123!"
+  description = "Windows Administrator password for WinRM"
+  sensitive   = true
+}