chore(wip): état runtime .ideai (conversations, layouts, mémoire, skills)

Snapshot de l'état runtime accumulé sur develop : logs/handoffs de
conversations, layouts, notes mémoire (dont git-owns-commit-merge-decisions)
et catalogue de skills.

Co-Authored-By: Claude Opus 4.8 <noreply@anthropic.com>

.ideai/skills/index.json

@@ -0,0 +1,10 @@
+{
+  "version": 1,
+  "skills": [
+    {
+      "id": "a72dac60-641c-4417-b0d7-94b8539f817a",
+      "name": "build-appimage",
+      "contentHash": "77cb33b978b242f6"
+    }
+  ]
+}