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.

src/StellaOps.Bench/LinkNotMerge.Vex/StellaOps.Bench.LinkNotMerge.Vex/VexScenarioExecutionResult.cs

@@ -0,0 +1,14 @@
+namespace StellaOps.Bench.LinkNotMerge.Vex;
+
+internal sealed record VexScenarioExecutionResult(
+    IReadOnlyList<double> TotalDurationsMs,
+    IReadOnlyList<double> InsertDurationsMs,
+    IReadOnlyList<double> CorrelationDurationsMs,
+    IReadOnlyList<double> AllocatedMb,
+    IReadOnlyList<double> ObservationThroughputsPerSecond,
+    IReadOnlyList<double> EventThroughputsPerSecond,
+    int ObservationCount,
+    int AliasGroups,
+    int StatementCount,
+    int EventCount,
+    VexAggregationResult AggregationResult);