feat: Add Azure RBAC condition parser (#496)

* feat: Add Azure RBAC condition parser

- declare an `azure-rbac` feature and expose the Azure RBAC module with parser, AST, and YAML-driven tests
- extend the shared lexer with RBAC-specific tokens, single-quoted strings, and corrected raw-string spans
- verify the parser via comprehensive test cases covering every operator and complex chaining

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>



---------

Signed-off-by: Anand Krishnamoorthi <anakrish@microsoft.com>

.github/workflows/tests-debug.yml

@@ -42,3 +42,5 @@ jobs:
     - name: Run tests (OPA Conformance)
       run: >-
         cargo test --test opa --frozen --features opa-testutil,serde_json/arbitrary_precision  -- $(tr '\n' ' ' < tests/opa.passing)
+    - name: Run tests (Azure RBAC)
+      run: cargo test --frozen --features azure-rbac