fix: correct inaccurate download size estimates in starter models by Pfannkuchensack · Pull Request #8968

fix: correct inaccurate download size estimates in starter models by Pfannkuchensack · Pull Request #8968 · invoke-ai/InvokeAI

Verified model sizes against Hugging Face repositories and corrected
11 descriptions that had wrong or outdated download size estimates.

Key corrections:
- T5-XXL base encoder: ~8GB → ~9.5GB
- FLUX.2 VAE: ~335MB → ~168MB (was confused with FLUX.1 VAE)
- FLUX.1 Krea dev: ~33GB → ~29GB (uses quantized T5, not full)
- FLUX.2 Klein 4B/9B Diffusers: ~10GB/~20GB → ~16GB/~35GB
- SD3.5 Medium/Large: ~15GB/~19G → ~16GB/~28GB
- CogView4: ~29GB → ~31GB
- Z-Image Turbo: ~30.6GB → ~33GB
- FLUX.1 Kontext/Krea quantized: ~14GB → ~12GB