feat(azure-policy): add alias normalization and denormalization (#635)

* feat: add Azure Policy alias normalization/denormalization

Add normalizer and denormalizer for ARM JSON resources, enabling Azure
Policy alias short names to become direct paths into a flat structure.

- Normalizer: flattens properties wrappers, lowercases keys, resolves
  per-alias versioned ARM paths, handles sub-resource array flattening,
  element-level field remaps, and array base renames
- Denormalizer: reverses all transformations with casing restoration
- AliasRegistry: loads production alias catalogs and data policy manifests
- Types: serde deserialization for ARM provider alias formats
- YAML test suite: 13 test files covering normalize, denormalize, round-trip,
  data-plane, edge cases, malformed input, sub-resources, and registry API
- Benchmark suite for normalization performance

* feat: add FFI and C# bindings for alias normalization

- FFI: alias_registry.rs with C-compatible API for loading catalogs,
  normalizing resources, and denormalizing back to ARM JSON
- C#: AliasRegistry wrapper class with NativeMethods P/Invoke bindings
  and integration tests
- Updated Cargo.lock files for new serde_json dependency

tests/mod.rs

@@ -12,5 +12,8 @@ mod lexer;
 mod parser;
 mod value;
 
+#[cfg(feature = "azure_policy")]
+mod azure_policy;
+
 #[cfg(feature = "rvm")]
 mod rvm;