Establish clean homelab infrastructure baseline

Reorganize the brownfield repository, remove retired and generated artifacts, harden ignore rules, and record the GitOps/IaC redesign.

apps/netbox/terraform/outputs.tf

@@ -0,0 +1,14 @@
+output "site_id" {
+  value       = netbox_site.this.id
+  description = "NetBox ID of the Homelab site."
+}
+
+output "prefix_ids" {
+  value       = { for k, p in netbox_prefix.this : k => p.id }
+  description = "prefix -> NetBox ID, for cross-referencing from other tooling."
+}
+
+output "device_ids" {
+  value       = { for k, d in netbox_device.this : k => d.id }
+  description = "device name -> NetBox ID."
+}