chore(model gallery): add qwen3-embedding-8b

[mudler]

Description

This pull request adds a new entry to the gallery/index.yaml file for the Qwen3-Embedding-8B model. The change introduces detailed metadata and descriptions for this model, highlighting its capabilities and features.

Addition of Qwen3-Embedding-8B model metadata:

• Model Description: Added comprehensive details about the Qwen3-Embedding-8B model, emphasizing its state-of-the-art performance in text embedding and ranking tasks, multilingual capabilities, and flexibility in embedding dimensions and user-defined instructions.
• Tags and URLs: Included tags (qwen3, embedding, gguf, gpu, cpu) and the URL linking to the model on Hugging Face.
• Technical Specifications: Listed key features such as supported languages (100+), number of parameters (8B), context length (32k), embedding dimensions (32–4096), and supported quantization types (e.g., q4_K_M, q8_0, f16).
• File Information: Added file details, including the filename, SHA256 checksum, and URI for downloading the model.

Notes for Reviewers

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