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/kernel/files/mesh-kernel-huge-pages.service

@@ -0,0 +1,25 @@
+[Unit]
+Description=Transparent huge pages as the mesh sets them on this machine
+# Module kernel, novox/hq issue 746. Starting this unit sets the mode from the setting
+# transparent-huge-pages; reloading it (the setting changed) sets the new mode; stopping it gives back the
+# mode the machine had before. It runs early in boot, before the services that fill the page cache.
+DefaultDependencies=no
+After=local-fs.target
+Before=sysinit.target shutdown.target
+Conflicts=shutdown.target
+
+[Service]
+Type=oneshot
+RemainAfterExit=yes
+ExecStart=${dir:state}/huge-pages apply
+ExecReload=${dir:state}/huge-pages apply
+ExecStop=${dir:state}/huge-pages restore
+# It writes one file under /sys and its own state, and asks the journal daemon to rotate over its socket.
+ProtectSystem=strict
+ReadWritePaths=${dir:state}
+ProtectHome=yes
+PrivateNetwork=yes
+NoNewPrivileges=yes
+
+[Install]
+WantedBy=sysinit.target