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.

docs/notifications/fixtures/rendering/index.ndjson

@@ -0,0 +1 @@
+{"template_id":"tmpl-incident-start","locale":"en-US","channel":"email","expected_hash":"TBD","body_sample_path":"tmpl-incident-start.email.en-US.json"}

docs/notifications/fixtures/rendering/tmpl-incident-start.email.en-US.json

@@ -0,0 +1,6 @@
+{
+  "subject": "Incident started: ${incident_id}",
+  "body": "Incident ${incident_id} started at ${started_at}. Severity: ${severity}.",
+  "merge_fields": ["incident_id", "started_at", "severity"],
+  "preview_hash": "TBD"
+}