Fix MiniMax-H3 dependency versions and Diffusers links

[Ray0907]

Summary

• pin Diffusers to the commit that merged MiniMax-H3 support
• raise the Transformers minimum to the first Qwen3-VL release
• declare PyYAML, einops, and torchvision as direct dependencies
• replace the removed minimax-h3 branch links in all localized READMEs

Why

Diffusers 0.39.0 predates MiniMax-H3 support, and the documented
minimax-h3 branch no longer exists. Qwen3-VL is also unavailable in the
currently declared Transformers minimum. A clean install can therefore miss
required model classes and directly imported packages.

Validation

• python -m pip install --dry-run --ignore-installed --no-deps -r requirements.txt
• verified the pinned Diffusers commit and documentation path through GitHub
• git diff --check

Addresses #4 and the dependency/documentation concerns from #6.

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