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.

etc/registry-token.yaml

@@ -0,0 +1,30 @@
+registryTokenService:
+  authority:
+    issuer: "https://authority.localhost"
+    requireHttpsMetadata: false
+    audiences:
+      - "registry"
+    requiredScopes:
+      - "registry.token.issue"
+  signing:
+    issuer: "https://registry.localhost/token"
+    keyPath: "etc/registry-signing-sample.pem"
+    keyPassword: ""
+    lifetime: "00:05:00"
+  registry:
+    realm: "https://registry.localhost/v2/token"
+    allowedServices:
+      - "registry.localhost"
+  defaultPlan: "community"
+  plans:
+    - name: "community"
+      repositories:
+        - pattern: "stella-ops/public/*"
+          actions: [ "pull" ]
+    - name: "enterprise"
+      repositories:
+        - pattern: "stella-ops/public/*"
+          actions: [ "pull" ]
+        - pattern: "stella-ops/enterprise/*"
+          actions: [ "pull" ]
+  revokedLicenses: []