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/README.md

@@ -0,0 +1,25 @@
+# Policy Samples
+
+Curated fixtures used by CI smoke/determinism checks and example documentation.
+
+| Scenario | Policy | Findings | Expected Diff | UI/CLI Diff Fixture |
+|----------|--------|----------|---------------|---------------------|
+| `baseline` | `docs/examples/policies/baseline.yaml` | `samples/policy/baseline/findings.json` | `samples/policy/baseline/diffs.json` | `samples/policy/simulations/baseline/diff.json` |
+| `serverless` | `docs/examples/policies/serverless.yaml` | `samples/policy/serverless/findings.json` | `samples/policy/serverless/diffs.json` | `samples/policy/simulations/serverless/diff.json` |
+| `internal-only` | `docs/examples/policies/internal-only.yaml` | `samples/policy/internal-only/findings.json` | `samples/policy/internal-only/diffs.json` | `samples/policy/simulations/internal-only/diff.json` |
+
+Run the simulation harness locally:
+
+```bash
+dotnet run \
+  --project tools/PolicySimulationSmoke/PolicySimulationSmoke.csproj \
+  -- \
+  --scenario-root samples/policy/simulations \
+  --output out/policy-simulations
+```
+
+Then inspect `out/policy-simulations/policy-simulation-summary.json` for verdict changes.
+
+---
+
+*Last updated: 2025-10-26.*