chore(model gallery): add qwen3-0.6b

[mudler]

Description

This pull request adds a new entry for the Qwen3-0.6B model to the gallery/index.yaml file. The addition includes detailed metadata and descriptions for the model.

Key Changes:

New Model Addition:

• Added a new entry for the Qwen3-0.6B model, including its name, URLs, description, and key features. The description highlights its advancements in reasoning, multilingual support, and agent capabilities.
• Provided specific model details such as type (Causal Language Model), training stages, parameter counts, number of layers, attention head configuration, and context length.
• Included file metadata for the model, such as filename, SHA256 hash, and URI for downloading the model.

Notes for Reviewers

Signed commits

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