Capture mesh-catalog at feat/r4g (2246ccc4) with the templates its manifests name and its predefined.json, and lay the copy out as a repository's root

The catalogue's manifests moved their content into template files and fall back to predefined keys, so a copy of
module.json alone no longer passes the catalogue's own check; the bus's Dockerfile is gone from the catalogue.

testdata/beside/mesh-catalog/modules/systemd/module.json.captured

@@ -41,7 +41,7 @@
           "systemd-tools"
         ],
         "env": {
-          "MESH_SYSTEMD_STATE": "${dir:state}"
+          "MESH_SYSTEMD_STATE": "${dir:data}"
         }
       }
     ]
@@ -53,10 +53,19 @@
       "package": "systemd"
     },
     {
-      "id": "state",
+      "id": "data",
       "type": "directory",
       "mode": "0700",
-      "place": "."
+      "place": "mesh",
+      "unknown": "program"
+    },
+    {
+      "id": "state",
+      "type": "directory",
+      "path": "/var/lib/systemd",
+      "owner": "root",
+      "mode": "0755",
+      "unknown": "program"
     }
   ]
 }