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.

NuGet.config

@@ -12,6 +12,7 @@
   <packageSourceMapping>
     <packageSource key="local">
       <package pattern="Mongo2Go" />
+      <package pattern="Microsoft.IdentityModel.Tokens" />
       <package pattern="Microsoft.Extensions.Http.Polly" />
       <package pattern="Microsoft.Extensions.Caching.Memory" />
       <package pattern="Microsoft.Extensions.Configuration" />