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.

scripts/export-policy-schemas.sh

@@ -0,0 +1,11 @@
+#!/usr/bin/env bash
+set -euo pipefail
+
+REPO_ROOT="$(cd "$(dirname "${BASH_SOURCE[0]}")"/.. && pwd)"
+OUTPUT_DIR="${1:-$REPO_ROOT/docs/schemas}"
+
+pushd "$REPO_ROOT" > /dev/null
+
+dotnet run --project tools/PolicySchemaExporter -- "$OUTPUT_DIR"
+
+popd > /dev/null