fix: replace python3 with py/jq throughout scripts and docs

Windows Store python3 stub returns exit 49 instead of running Python.
Replace with: py (Windows launcher) for actual Python code, jq for
simple JSON extraction. Reorder fallback loops to try py first.
Add Bash(py:*) to settings.local.json allowlist.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

.claude/skills/1password/scripts/check_setup.sh

@@ -50,7 +50,7 @@ if op account list &>/dev/null 2>&1; then
   echo ""
   echo "  Vaults:"
   op vault list --format=json 2>/dev/null | \
-    python3 -c "import sys,json; [print(f'    • {v[\"name\"]} ({v[\"id\"]})') for v in json.load(sys.stdin)]" 2>/dev/null || true
+    jq -r '.[] | "    \u2022 \(.name) (\(.id))"' 2>/dev/null || true
 fi
 
 echo ""