Add Policy DSL Validator, Schema Exporter, and Simulation Smoke tools

- Implemented PolicyDslValidator with command-line options for strict mode and JSON output.
- Created PolicySchemaExporter to generate JSON schemas for policy-related models.
- Developed PolicySimulationSmoke tool to validate policy simulations against expected outcomes.
- Added project files and necessary dependencies for each tool.
- Ensured proper error handling and usage instructions across tools.

out/policy-simulations/policy-simulation-summary.json

@@ -0,0 +1,32 @@
+[
+  {
+    "ScenarioName": "baseline",
+    "Success": true,
+    "ChangedCount": 2,
+    "Failures": [],
+    "ActualStatuses": {
+      "library:pkg/openssl@1.1.1w": "Blocked",
+      "library:pkg/internal-runtime@1.0.0": "Warned"
+    }
+  },
+  {
+    "ScenarioName": "internal-only",
+    "Success": true,
+    "ChangedCount": 2,
+    "Failures": [],
+    "ActualStatuses": {
+      "library:pkg/internal-app@2.0.0": "RequiresVex",
+      "library:pkg/kev-component@3.1.4": "RequiresVex"
+    }
+  },
+  {
+    "ScenarioName": "serverless",
+    "Success": true,
+    "ChangedCount": 2,
+    "Failures": [],
+    "ActualStatuses": {
+      "library:pkg/aws-lambda@1.0.0": "Blocked",
+      "image:sha256:untrusted-base": "Blocked"
+    }
+  }
+]