Added Readme for gpt-oss MD

ai-quick-actions/model-deployment-gptoss-tips.md

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+# Model Deployment - GPT-OSS
+
+OpenAI has announced the release of [two open weight models](https://openai.com/index/introducing-gpt-oss/), gpt-oss-120b and gpt-oss-20b, their first open-weight language models since GPT‑2.  According to OpenAI, their performance are on par or exceed OpenAI's internal models, and both models perform strongly on tool use, few-shot function calling, CoT reasoning and HealthBench. 
+
+Here are the new OpenAI open weight models: 
+
+* gpt-oss-120b — designed for production, general-purpose and high-reasoning use cases. The model has 117B parameters with 5.1B active parameters
+* gpt-oss-20b — designed for lower latency and local or specialized use cases. The model has 21B parameters with 3.6B active parameters
+
+Both models are now available in OCI Data Science AI Quick Actions.  The models are cached in our service and readily available to be deployed and fine tuned, without the need for customers to bring in the model artifacts from external sites. By using AI Quick Actions, customers can leverage our service managed container with the latest vllm version that supports both of the models, eliminating the need to build or bring your own container for working with the models. 
+
+![Deploy Model](web_assets/openai_modelcard.png)
+
+![GPT-OSS-20b Model card](web_assets/model-deploy-gptoss.png)
+
+
+## Deploying an LLM
+
+After picking a model from the model explorer, if the "Deploy Model" is enabled you can use this
+form to quickly deploy the model:
+
+![Deploy Model](web_assets/model-deploy-gptoss-2.png)
+
+## Setting Environment Variable
+There are multiple shapes which support the deployment of the model. But if you are using shape other than H100 or H200 you are required to pass an extra environment variable while deploying the model. You can do so by:
+* go to show advanced section at the bottom of the form
+* go to Custom Environment Variables
+* Put 'VLLM_ATTENTION_BACKEND' as key 
+* Put 'TRITON_ATTN_VLLM_V1' as value
+
+![Set Environment Variable](web_assets/model-deploy-gptoss-env-var.png)
+
+Now you can deploy the model in shapes other than H100 or H200
+
+Also to know more on model deployments you can refer [Model Deployment Tips](model-deployment-tips.md) page.