chore(model gallery): add mistralai_devstral-small-2505

[mudler]

Description

This pull request adds a new entry to the gallery/index.yaml file to include details about the mistralai_devstral-small-2505 model. The addition provides comprehensive metadata, including URLs, a description, and file details for the model.

New Model Addition:

• Model Name: mistralai_devstral-small-2505
  • Added metadata for the model, including its name, URLs, and a detailed description highlighting its features and capabilities. The description emphasizes its use as an agentic LLM for software engineering tasks, its lightweight design, and its 128k context window.
  • Included file details with SHA-256 checksums and URIs for two associated files: mistralai_Devstral-Small-2505-Q4_K_M.gguf and mmproj-mistralai_Devstral-Small-2505-f16.gguf.

Notes for Reviewers

Signed commits

• Yes, I signed my commits.

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