Add pipeline tag and library name

This PR adds the missing `pipeline_tag` and `library_name` to the model card metadata. This improves discoverability and clarifies the model's capabilities and dependencies. It also fixes a typo from "thoese" to "those".

README.md

@@ -1,5 +1,7 @@
 ---
 license: apache-2.0
+pipeline_tag: text-to-image
+library_name: llamagen
 ---
 
 # Model Weights for ControlAR
@@ -34,3 +36,5 @@ If you find ControlAR is useful in your research or applications, please conside
 }
 ```
 
+## Acknowledgements
+The development of ControlAR is based on [LlamaGen](https://github.com/FoundationVision/LlamaGen), [ControlNet](https://github.com/lllyasviel/ControlNet), [ControlNet++](https://github.com/liming-ai/ControlNet_Plus_Plus), and [AiM](https://github.com/hp-l33/AiM), and we sincerely thank the contributors for those great works!