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.

samples/api/scheduler/policy-diff-summary.json

@@ -0,0 +1,31 @@
+{
+  "schemaVersion": "scheduler.policy-diff-summary@1",
+  "added": 12,
+  "removed": 8,
+  "unchanged": 657,
+  "bySeverity": {
+    "critical": {
+      "up": 1
+    },
+    "high": {
+      "up": 3,
+      "down": 4
+    },
+    "medium": {
+      "up": 2,
+      "down": 1
+    }
+  },
+  "ruleHits": [
+    {
+      "ruleId": "rule-block-critical",
+      "ruleName": "Block Critical Findings",
+      "up": 1
+    },
+    {
+      "ruleId": "rule-quiet-low",
+      "ruleName": "Quiet Low Risk",
+      "down": 2
+    }
+  ]
+}