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.

samples/policy/simulations/baseline/diff.json

@@ -0,0 +1,23 @@
+{
+  "summary": {
+    "policy": "baseline",
+    "policyDigest": "sha256:simulation-baseline",
+    "changed": 2
+  },
+  "diffs": [
+    {
+      "findingId": "library:pkg/openssl@1.1.1w",
+      "baselineStatus": "Pass",
+      "projectedStatus": "Blocked",
+      "rule": "block_critical",
+      "notes": "Critical severity must be remediated before deploy."
+    },
+    {
+      "findingId": "library:pkg/internal-runtime@1.0.0",
+      "baselineStatus": "Pass",
+      "projectedStatus": "Warned",
+      "rule": "alert_warn_eol_runtime",
+      "notes": "Runtime marked as EOL; upgrade recommended."
+    }
+  ]
+}