docs: note superseded by zen3-vl, weights retained

docs: honest base attribution / canonical-name note

Add LICENSE and NOTICE files for license compliance

Add NOTICE: Copyright Zen Authors

fix(readme): frontmatter:language

Update model card: fix YAML tags, add zen/zenlm branding

Update README with Zen branding

Add model weights

Initialize zen-vl-8b-instruct model card

initial commit