chore: register app.json for session protocol

Registers the repo as a Wiggleverse app so its build sessions get tracked
transcripts. One Name = main repo name (human-experience-filter-art);
sessions live self-contained in this repo under sessions/, matching the
benstull-host convention (benstull/docs).

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

app.json

@@ -0,0 +1,20 @@
+{
+  "schemaVersion": "1.0",
+  "name": "human-experience-filter-art",
+  "title": "Human Experience Filter — art installation",
+  "giteaHost": "ssh://git@git.benstull.org",
+  "repos": [
+    {
+      "namespace": "benstull",
+      "name": "human-experience-filter-art",
+      "contains": ["code", "specs", "documentation", "roadmap", "sessions"],
+      "sessions": {
+        "subdir": "sessions",
+        "layout": "folder-per-session",
+        "naming": "numeric",
+        "manifest": true,
+        "visibility": "private"
+      }
+    }
+  ]
+}