Relicense Juggernaut Z under CC BY-NC 4.0; add commercial-use contact path

Fix dtype label: main safetensors is BF16, not FP32 (per @prookyon , discussion #1)

Title: same-size 'by RunDiffusion'

Add 'by RunDiffusion' to title

Redesign hero: HTML-centered layout, clean badge row, accent color, blockquote lead

Refresh model card: add RD branding, fp16 listing, UTM links, polish copy

Add all website comparisons to model card

Clarify comparison labels in model card

Update model card for Juggernaut Z

initial commit