[Core] Add Host Weight Runtime foundation (#6419)

Signed-off-by: Hongsheng Liu <liuhongsheng4@huawei.com>

docs/design/index.md

@@ -18,6 +18,7 @@ implementation contract; it is not, by itself, a general support claim.
 ### Runtime and stage execution
 
 - [Disaggregated Inference](feature/disaggregated_inference.md)
+- [Host Weight Runtime](feature/host_weight_runtime.md)
 - [Async Chunk](feature/async_chunk.md)
 - [Async Diffusion Output](feature/async_diffusion_output.md)
 - [Async Omni Output Materialization](feature/omni_async_output_materialization.md)
@@ -88,14 +89,15 @@ The design contracts separate selection mechanics from backend algorithms:
 - [Model Integration](module/model_integration.md)
 - [Autoregressive Runtime](module/ar_runtime.md)
 - Diffusion
-  - [Overview](module/diffusion/index.md)
-  - [Runtime](module/diffusion/diffusion_runtime.md)
-  - [Model Integration](module/diffusion/diffusion_model_integration.md)
-  - [Continuous Batching](module/diffusion/continuous_batching.md)
-  - [Parallelism](module/diffusion/parallelism.md)
-  - [Offloader](module/diffusion/offloader.md)
+    - [Overview](module/diffusion/index.md)
+    - [Runtime](module/diffusion/diffusion_runtime.md)
+    - [Model Integration](module/diffusion/diffusion_model_integration.md)
+    - [Continuous Batching](module/diffusion/continuous_batching.md)
+    - [Parallelism](module/diffusion/parallelism.md)
+    - [Offloader](module/diffusion/offloader.md)
 - [Execution Platforms](module/execution_platforms.md)
 - [Cache Management](module/cache_management.md)
+- [Host Weight Runtime](module/host_weight_runtime.md)
 - [Quantization](module/quantization.md)
 - [Observability](module/observability.md)
 - [Profiling](module/profiling.md)