localization: locale, time zone and console keymap as one module

One machine ran another time zone and a German console keymap with no record
why. The module writes /etc/locale.conf and /etc/vconsole.conf whole and sets
the zone through a run-once step of its own Go binary (timedatectl, read
back): /etc/localtime is a link the mesh may not write (hq ADR 0012) and a
module may not declare an action (ADR 0005). Tools: localization_get,
_time_zone, _locales, _keymaps (to-be 42 Phase 1).

modules/localization/module.json

@@ -0,0 +1,56 @@
+{
+  "module": "localization",
+  "version": "1",
+  "capabilities": [
+    "service-manager"
+  ],
+  "tools": [
+    "localization_get",
+    "localization_time_zone",
+    "localization_locales",
+    "localization_keymaps"
+  ],
+  "resources": [
+    {
+      "id": "locale",
+      "type": "file",
+      "path": "/etc/locale.conf",
+      "mode": "0644",
+      "content": "# The mesh's (module localization, novox/hq to-be 42): the system locale. Written whole at every\n# push; an edit here is overwritten. Read at the next login.\nLANG=en_US.UTF-8\n"
+    },
+    {
+      "id": "keymap",
+      "type": "file",
+      "path": "/etc/vconsole.conf",
+      "mode": "0644",
+      "content": "# The mesh's (module localization, novox/hq to-be 42): the console keymap. Written whole at every\n# push; an edit here is overwritten. Read at the next boot.\nKEYMAP=us\n"
+    },
+    {
+      "id": "time-zone",
+      "type": "process",
+      "name": "localization-time-zone",
+      "artifact": "tools",
+      "run": [
+        "./localization-tools",
+        "set-time-zone",
+        "Europe/Brussels"
+      ],
+      "run-once": true
+    }
+  ],
+  "build": {
+    "artifacts": [
+      {
+        "name": "tools",
+        "kind": "bundle",
+        "language": "go",
+        "system": "arch",
+        "from": "cmd/localization-tools",
+        "binary": "localization-tools",
+        "loads": [
+          "localization-tools"
+        ]
+      }
+    ]
+  }
+}