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/zsh-syntax-highlighting/files/zsh-last

@@ -0,0 +1,3 @@
+# Syntax highlighting of the command line, from the distribution's package. Last, as upstream asks:
+# it wraps every widget defined before it.
+[[ ! -f /usr/share/zsh/plugins/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh ]] || source /usr/share/zsh/plugins/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh

testdata/beside/mesh-catalog/modules/zsh-syntax-highlighting/module.json.captured

@@ -1,21 +1,30 @@
 {
   "module": "zsh-syntax-highlighting",
   "version": "1",
+  "moved": true,
   "capabilities": [
     "package-manager"
   ],
-  "shell": [
-    {
-      "for": "zsh",
-      "slot": "last",
-      "code": "# Syntax highlighting of the command line, from the distribution's package. Last, as upstream asks:\n# it wraps every widget defined before it.\n[[ ! -f /usr/share/zsh/plugins/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh ]] || source /usr/share/zsh/plugins/zsh-syntax-highlighting/zsh-syntax-highlighting.zsh\n"
-    }
-  ],
   "resources": [
     {
       "id": "package",
       "type": "package",
       "package": "zsh-syntax-highlighting"
     }
-  ]
+  ],
+  "items": [
+    {
+      "collection": "shell:zsh:last",
+      "template": "files/zsh-last"
+    }
+  ],
+  "build": {
+    "artifacts": [
+      {
+        "name": "files",
+        "kind": "archive",
+        "from": "files"
+      }
+    ]
+  }
 }