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/schemas/rule.schema.json

@@ -0,0 +1,37 @@
+{
+  "$schema": "https://json-schema.org/draft/2020-12/schema",
+  "$id": "https://stella-ops.org/notify/schemas/rule.schema.json",
+  "title": "Notify Rule",
+  "type": "object",
+  "required": [
+    "schema_version",
+    "tenant_id",
+    "rule_id",
+    "name",
+    "sources",
+    "predicates",
+    "actions",
+    "approvals_required"
+  ],
+  "properties": {
+    "schema_version": { "type": "string", "pattern": "^v[0-9]+\\.[0-9]+$" },
+    "tenant_id": { "type": "string", "minLength": 1 },
+    "rule_id": { "type": "string", "pattern": "^[A-Z0-9_-]{4,64}$" },
+    "name": { "type": "string", "minLength": 1 },
+    "description": { "type": "string" },
+    "severity": { "type": "string", "enum": ["info", "low", "medium", "high", "critical"] },
+    "sources": { "type": "array", "items": { "type": "string" }, "minItems": 1 },
+    "predicates": { "type": "array", "items": { "type": "object" }, "minItems": 1 },
+    "actions": {
+      "type": "array",
+      "items": { "type": "object" },
+      "minItems": 1
+    },
+    "approvals_required": { "type": "integer", "minimum": 0, "maximum": 3 },
+    "quiet_hours": { "type": "array", "items": { "type": "string" } },
+    "simulation_required": { "type": "boolean", "default": true },
+    "created_at": { "type": "string", "format": "date-time" },
+    "updated_at": { "type": "string", "format": "date-time" }
+  },
+  "additionalProperties": false
+}