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/step-ca/module.json.captured

@@ -43,21 +43,24 @@
       "id": "mesh-state",
       "type": "directory",
       "mode": "0700",
-      "place": "mesh"
+      "place": "mesh",
+      "unknown": "program"
     },
     {
       "id": "home",
       "type": "directory",
       "mode": "0700",
       "owner": "1000:1000",
-      "place": "."
+      "place": ".",
+      "unknown": "program"
     },
     {
       "id": "config",
       "type": "file",
       "path": "${dir:mesh-state}/config.json",
       "mode": "0644",
-      "content": "{}",
+      "template": "files/config.json",
+      "takes-config": [],
       "merge": "json"
     },
     {
@@ -65,7 +68,7 @@
       "type": "file",
       "path": "${dir:mesh-state}/init.env",
       "mode": "0600",
-      "content": "DOCKER_STEPCA_INIT_PASSWORD=${secret:password}\nDOCKER_STEPCA_INIT_DNS_NAMES=${machine:at},${machine:name},localhost,127.0.0.1\n"
+      "template": "files/init.env"
     },
     {
       "id": "server",
@@ -90,5 +93,14 @@
       ],
       "secrets-in-environment": "the entrypoint honours DOCKER_STEPCA_INIT_PASSWORD_FILE; convertible, awaiting a bed that proves it"
     }
-  ]
+  ],
+  "build": {
+    "artifacts": [
+      {
+        "name": "files",
+        "kind": "archive",
+        "from": "files"
+      }
+    ]
+  }
 }