Add dana agent provider stub

- Register inline::dana provider in agents registry
- Add stub implementation with get_provider_impl function
- Add DanaAgentConfig with sample_run_config
- Include dana provider in starter, starter-gpu, and ci-tests distributions
- All agent methods currently raise NotImplementedError until implementation

src/llama_stack/providers/registry/agents.py

@@ -38,4 +38,20 @@ def available_providers() -> list[ProviderSpec]:
             ],
             description="Meta's reference implementation of an agent system that can use tools, access vector databases, and perform complex reasoning tasks.",
         ),
+        InlineProviderSpec(
+            api=Api.agents,
+            provider_type="inline::dana",
+            pip_packages=["dana>=0.1.0"],
+            module="llama_stack.providers.inline.agents.dana",
+            config_class="llama_stack.providers.inline.agents.dana.DanaAgentConfig",
+            api_dependencies=[
+                Api.inference,
+                Api.safety,
+                Api.vector_io,
+                Api.tool_runtime,
+                Api.tool_groups,
+                Api.conversations,
+            ],
+            description="Dana agent system featuring STAR Loop (See-Think-Act-Reflect), deterministic workflows, and continuous learning via LoRA fine-tuning.",
+        ),
     ]