feat: Add Proxmox access setup documentation

- Created PROXMOX_ACCESS.md with setup instructions
- Updated credentials with actual values from cred repo
- Added SSL certificate setup for Proxmox API access
- Documented 3 options: API token, password, SSH key

packer/variables.pkr.hcl

@@ -1,6 +1,6 @@
 variable "proxmox_url" {
   type        = string
-  default     = "https://la-vmh-07:8006/api2/json"
+  default     = "https://10.32.2.11:8006/api2/json"
   description = "Proxmox API URL"
 }
 
@@ -13,7 +13,7 @@ variable "proxmox_username" {
 variable "proxmox_password" {
   type        = string
   default     = ""
-  description = "Proxmox password (set via PKR_VAR_proxmox_password env var)"
+  description = "Proxmox password or API token secret"
   sensitive   = true
 }