Add Debian 13 support and update Debian 11/12 ISOs

- Add complete Debian 13 (Trixie) support with all necessary configuration files
- Update Debian 11 ISO to 11.11.0 with SHA512 checksum
- Update Debian 12 ISO to 12.12.0 with SHA512 checksum
- Created new debian/13 directory with packer templates and variables
- Added preseed configuration for Debian 13 automated installation

builds/linux/debian/13/variables-network.pkr.hcl

@@ -0,0 +1,36 @@
+/*
+    DESCRIPTION:
+    Debian Linux 13 network variables used by the Packer Plugin for VMware vSphere (vsphere-iso).
+*/
+
+// VM Network Settings
+
+variable "vm_network_device" {
+  type        = string
+  description = "The network device of the VM."
+  default     = "ens192"
+}
+
+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     = []
+}