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.

docs/examples/policies/internal-only.yaml

@@ -0,0 +1,31 @@
+version: "1.0"
+metadata:
+  description: Relaxed internal/development policy
+  tags:
+    - internal
+    - dev
+rules:
+  - name: Block KEV advisories
+    tags: [kev]
+    action: block
+
+  - name: Warn medium severity
+    severity: [Medium]
+    environments: [internal]
+    action: warn
+
+  - name: Accept vendor VEX
+    action:
+      type: require_vex
+      requireVex:
+        vendors: [VendorX, VendorY]
+        justifications:
+          - component_not_present
+          - vulnerable_code_not_present
+
+  - name: Quiet low severity
+    severity: [Low, Informational]
+    action:
+      type: ignore
+      until: 2026-01-01T00:00:00Z
+      justification: "Deferred to annual remediation cycle"