chore(model gallery): add steelskull_l3.3-cu-mai-r1-70b

[mudler]

Description

This pull request includes a significant update to the gallery/index.yaml file, adding a new model entry with detailed metadata and descriptions. The most important changes are:

• Added a new model entry for Steelskull_L3.3-Cu-Mai-R1-70b with a detailed description, including its unique features and user feedback.
• Included URLs for accessing the new model on Hugging Face.
• Added an icon link for the new model.
• Provided a list of specialized components integrated into the new model using the SCE merge method.
• Included file details such as filename, SHA256 checksum, and URI for the new model.

Notes for Reviewers

Signed commits

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