chore(model gallery): add microsoft_phi-4-mini-reasoning

[mudler]

Description

This pull request adds a new entry for the Phi-4-mini-reasoning model to the gallery/index.yaml file. The entry provides detailed information about the model, including its description, use cases, limitations, and associated files.

New model addition:

• Added Phi-4-mini-reasoning model entry:
  The Phi-4-mini-reasoning model is introduced as part of the Phi-4 family. It is a compact, transformer-based language model optimized for advanced mathematical reasoning tasks. The entry includes:
  • A description highlighting its focus on multi-step, logic-intensive problem-solving, and its suitability for constrained environments.
  • Use cases such as formal proof generation, symbolic computation, and educational applications.
  • Warnings about its design limitations and considerations for accuracy, safety, and fairness in downstream use.
  • Associated files, including the model file microsoft_Phi-4-mini-reasoning-Q4_K_M.gguf with its SHA-256 checksum and URI.

Notes for Reviewers

Signed commits

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