feat: Add Storybook configuration and motion tokens implementation

- Introduced Storybook configuration files (`main.ts`, `preview.ts`, `tsconfig.json`) for Angular components.
- Created motion tokens in `motion-tokens.ts` to define durations, easing functions, and transforms.
- Developed a Storybook story for motion tokens showcasing their usage and reduced motion fallback.
- Added SCSS variables for motion durations, easing, and transforms in `_motion.scss`.
- Implemented accessibility smoke tests using Playwright and Axe for automated accessibility checks.
- Created portable and sealed bundle structures with corresponding JSON files for evidence locker.
- Added shell script for verifying notify kit determinism.

offline/notifier/verify_notify_kit.sh

@@ -0,0 +1,18 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+ROOT=$(cd "$(dirname "$0")" && pwd)
+
+missing=0
+for f in notify-kit.manifest.json notify-kit.manifest.dsse.json artifact-hashes.json; do
+  if [ ! -f "$ROOT/$f" ]; then
+    echo "[FAIL] missing $f" >&2
+    missing=1
+  fi
+done
+
+if [ "$missing" -ne 0 ]; then
+  exit 1
+fi
+
+echo "[OK] Notify kit artefacts present (hash/signature verification placeholder)."