chore(model gallery): add holo1.5-72b

[mudler]

Description

This pull request adds a new model entry for holo1.5-72b to the gallery/index.yaml file. The update introduces a state-of-the-art foundational model for Computer Use (CU) agents, providing details, download links, and configuration for integration.

New model addition:

• Added a new model entry for holo1.5-72b with descriptive information, icon, and links to Hugging Face repositories.
• Provided a detailed description highlighting the model's capabilities in UI localization and UI-based question answering, including supported benchmarks.
• Specified model overrides and parameters for integration, including mmproj and quantized GGUF files.
• Listed downloadable files with their respective SHA256 checksums and URIs for model weights and projection files.

Notes for Reviewers

Signed commits

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