Register app.json for the VS Code coauthoring plugin

Registers this repo (code/specs/docs/roadmap/sessions) and the
benstull/vs-cowriting-plugin-content content repo as one Wiggleverse app,
so the session protocol has a transcript home. Seeded from rfc-app#48.

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

app.json

@@ -0,0 +1,25 @@
+{
+  "schemaVersion": "1.0",
+  "name": "vs-code-cowriting-plugin",
+  "title": "VS Code Coauthoring Plugin — inner-loop human+machine coauthoring on Cline",
+  "giteaHost": "ssh://git@git.benstull.org",
+  "repos": [
+    {
+      "namespace": "benstull",
+      "name": "vs-code-cowriting-plugin",
+      "contains": ["code", "specs", "documentation", "roadmap", "sessions"],
+      "sessions": {
+        "subdir": "sessions",
+        "layout": "folder-per-session",
+        "naming": "numeric",
+        "manifest": true,
+        "visibility": "private"
+      }
+    },
+    {
+      "namespace": "benstull",
+      "name": "vs-cowriting-plugin-content",
+      "contains": ["content"]
+    }
+  ]
+}