refactor: separate standalone and managed room configs

- veins → shunts rename
- add cfg/standalone/ and cfg/<room>/ structure
- remove old data/*.json (moved to cfg/<room>/data/)
- update build.py and ctrl scripts

cfg/standalone/data/veins.json

@@ -0,0 +1,60 @@
+{
+  "items": [
+    {
+      "name": "jira",
+      "slug": "jira",
+      "title": "Jira",
+      "status": "live",
+      "system": "artery"
+    },
+    {
+      "name": "slack",
+      "slug": "slack",
+      "title": "Slack",
+      "status": "building",
+      "system": "artery"
+    },
+    {
+      "name": "google",
+      "slug": "google",
+      "title": "Google",
+      "status": "planned",
+      "system": "artery"
+    },
+    {
+      "name": "maps",
+      "slug": "maps",
+      "title": "Maps",
+      "status": "planned",
+      "system": "artery"
+    },
+    {
+      "name": "whatsapp",
+      "slug": "whatsapp",
+      "title": "WhatsApp",
+      "status": "planned",
+      "system": "artery"
+    },
+    {
+      "name": "gnucash",
+      "slug": "gnucash",
+      "title": "GNUCash",
+      "status": "planned",
+      "system": "artery"
+    },
+    {
+      "name": "vnc",
+      "slug": "vnc",
+      "title": "VNC",
+      "status": "planned",
+      "system": "artery"
+    },
+    {
+      "name": "ia",
+      "slug": "ia",
+      "title": "IA",
+      "status": "planned",
+      "system": "artery"
+    }
+  ]
+}