feat(iac): scaffold orca-platform layout (M1.1)

Lands manifests/, overlays/, dns/, scripts/, Makefile per M1.1. Bundles yourplatform.com→breakpilot.com rename. vms/ removed (out-of-scope for Orca).

Refs: M1.1

manifests/vm-data/litellm.toml

@@ -0,0 +1,18 @@
+# litellm stub — full config lands in M6.x.
+# Host: vm-data. Resource budget per INFRASTRUCTURE.md §6 co-tenant notes.
+
+[[service]]
+name = "litellm"
+image = "ghcr.io/berriai/litellm:main-stable"
+port = 4000
+
+[service.placement]
+node = "vm-data"
+
+[service.resources]
+memory = "1Gi"
+cpu = 0.5
+
+[service.env]
+LITELLM_MASTER_KEY = "${secrets.LITELLM_MASTER_KEY}"
+LITELLM_SALT_KEY = "${secrets.LITELLM_SALT_KEY}"