snapd: tools for the snaps, the package blocked on the mesh's AUR repository (hq to-be 42 phase 2.9)

snapd is not in the official repositories, and ADR 0205's archive does not
fit a daemon with setuid helpers, so the module declares nothing until
research 027 question 1 (P2) builds it into the mesh's own repository. Not
even its units: on the laptop they do not exist, and the module would fail
there.

Ten Go tools that work wherever snapd is installed and say so where it is
not: status (with AppArmor's absence from the kernel named), list, info,
updates, disk usage with the disabled revisions' share, services, changes,
and install, remove and refresh through sudo -n with --no-wait, answering
snapd's change id.

modules/snapd/module.json

@@ -0,0 +1,31 @@
+{
+  "module": "snapd",
+  "version": "1",
+  "tools": [
+    "snapd_status",
+    "snapd_list",
+    "snapd_info",
+    "snapd_updates",
+    "snapd_disk_usage",
+    "snapd_services",
+    "snapd_changes",
+    "snapd_install",
+    "snapd_remove",
+    "snapd_refresh"
+  ],
+  "build": {
+    "artifacts": [
+      {
+        "name": "tools",
+        "kind": "bundle",
+        "language": "go",
+        "system": "arch",
+        "from": "cmd/snapd-tools",
+        "binary": "snapd-tools",
+        "loads": [
+          "snapd-tools"
+        ]
+      }
+    ]
+  }
+}