Qwen 3 CMI features in Bedrock

Amazon Bedrock offer CMI to import different custom models. Qwen3 model family has recently been added to the list.

We should have a sample code snippet/instructions showcasing how can we import fine-tuned models into Bedrock CMI.

Current samples do not showcase Qwen

Start by reviewing the current Bedrock samples and the custom model import workflow to identify where a Qwen 3 example belongs. Add a sample code snippet or set of instructions showing how to import a fine-tuned Qwen 3 model into Bedrock CMI, with the completed sample demonstrating the full workflow.

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