Initialize wiggleverse-ecomm (clean ecomm rebuild)

Greenfield skeleton for the clean ecomm implementation, superseding the R01-R07
reference prototype (wiggleverse-ecomm-prototype). One Name "ecomm"; app.json
wires the code repo, the wiggleverse-ecomm-content collection repo, and the
session-history/ecomm transcript home. No application code yet — architecture is
to be designed in a brainstorming/planning session.

Co-Authored-By: Claude Opus 4.8 (1M context) <noreply@anthropic.com>

app.json

@@ -0,0 +1,30 @@
+{
+  "schemaVersion": "1.1",
+  "name": "ecomm",
+  "title": "Wiggleverse ecomm — multi-tenant commerce",
+  "giteaHost": "ssh://git@git.wiggleverse.org:2222",
+  "repos": [
+    {
+      "namespace": "wiggleverse",
+      "name": "wiggleverse-ecomm",
+      "contains": ["code", "specs", "documentation"]
+    },
+    {
+      "namespace": "wiggleverse",
+      "name": "wiggleverse-ecomm-content",
+      "contains": ["content", "specs", "roadmap", "documentation", "pin"]
+    },
+    {
+      "namespace": "wiggleverse",
+      "name": "session-history",
+      "contains": ["sessions"],
+      "sessions": {
+        "subdir": "ecomm",
+        "layout": "folder-per-session",
+        "naming": "numeric",
+        "manifest": true,
+        "visibility": "public"
+      }
+    }
+  ]
+}