feat: fine grained access control policy

This allows a set of rules to be defined for determining access to resources.

Signed-off-by: Gordon Sim <gsim@redhat.com>

tests/unit/providers/agent/test_meta_reference_agent.py

@@ -59,6 +59,7 @@ async def agents_impl(config, mock_apis):
         mock_apis["safety_api"],
         mock_apis["tool_runtime_api"],
         mock_apis["tool_groups_api"],
+        {},
     )
     await impl.initialize()
     yield impl