feat(poc): rewind MCP, skill, and recover-ladder docs

Initial PoC: find_protection, tagged checkpoints, FLR, mutating catalog.
Lab 10.9 status enums (0=Initializing, 1=MeetingSLA). Credentials stay in gitignored config.json.

config.example.json

@@ -0,0 +1,22 @@
+{
+  "zerto_url": "https://zvm.example.com",
+  "username": "rewind-svc",
+  "password": "change-me",
+  "client_id": "zerto-client",
+  "verify_tls": false,
+  "recovery_dir": "./recovered",
+  "mutating_tools": [
+    {
+      "server": "ssh",
+      "tool": "exec",
+      "vm_arg": "host",
+      "notes": "Remote shell on a guest. vm_arg is the hostname."
+    },
+    {
+      "server": "ansible",
+      "tool": "run_playbook",
+      "vm_arg": "limit",
+      "notes": "Playbook target host/group. Resolve to a single VM before guard."
+    }
+  ]
+}