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/gitlab/module.json.captured

@@ -4,20 +4,35 @@
   "own-secrets": {
     "token": "${dir:state}/token"
   },
+  "config": {
+    "gitlab-url": {
+      "type": "string",
+      "description": "The address of the GitLab instance the gitlab tools call, as a URL such as https://gitlab.com, laid into the file as GITLAB_URL; unset, the code falls back to its environment and answers no calls until it is given.",
+      "trusted": true,
+      "default": ""
+    }
+  },
   "resources": [
     {
       "id": "state",
       "type": "directory",
       "mode": "0700",
-      "place": "."
+      "place": ".",
+      "unknown": "program"
     },
     {
       "id": "config",
       "type": "file",
       "path": "${dir:state}/config.json",
       "merge": "json",
-      "content": "{}",
-      "mode": "0600"
+      "template": "files/config.json",
+      "mode": "0600",
+      "takes-config": [
+        {
+          "key": "gitlab-url",
+          "as": "GITLAB_URL"
+        }
+      ]
     }
   ],
   "capabilities": [
@@ -39,6 +54,11 @@
           "MESH_GITLAB_TOKEN_FILE": "${dir:state}/token",
           "MESH_GITLAB_CONFIG_FILE": "${dir:state}/config.json"
         }
+      },
+      {
+        "name": "files",
+        "kind": "archive",
+        "from": "files"
       }
     ]
   }