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.Aoc.Tests/StellaOps.Aoc.Tests.csproj

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+
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+    <!-- Note: to use Microsoft.Testing.Platform correctly with dotnet test: -->
+    <!-- 1. You must add dotnet.config specifying the test runner to be Microsoft.Testing.Platform -->
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+    <!-- For more information, see https://aka.ms/dotnet-test/mtp and https://xunit.net/docs/getting-started/v3/microsoft-testing-platform -->
+    <!-- To enable code coverage with Microsoft.Testing.Platform, add a package reference to Microsoft.Testing.Extensions.CodeCoverage -->
+    <!-- https://learn.microsoft.comdotnet/core/testing/microsoft-testing-platform-extensions-code-coverage -->
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