feat(ci): add gallery updater agent

[mudler]

Description

This PR adds a tentative agent to automatically add new models to the gallery, it does the following:

• First scans new models on HF
• Then it gathers the readmes of the model - trying to find the base model and/or the real one (from the quantized)
• It then select the best model from the searched
• it then assign a family from the one already present in the gallery
• it finally opens up a PR

For the agentic parts it uses https://github.com/mudler/cogito

Notes for Reviewers

Signed commits

• Yes, I signed my commits.

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