chore(release): v0.13.0

fix: resolve all 28 Dependabot security alerts

fix(web): resolve multiple Ahrefs SEO issues

fix(web): extend meta descriptions to 110-160 chars for SEO

fix(web): make docs page SSR-friendly and add outgoing links

style(web): rename terminal title to lumon-terminal (Severance easter egg)

fix(web): replace claude-code with your-agent in terminal demos

style(web): improve landing page copy and SEO metadata

feat(web): refactor docs into tabbed layout with sticky navigation

docs(web): merge duplicate skill sections into single Agent skill

docs: add agent skill and update documentation

style(web): refactor mobile menu with Vaul drawer and swap FAB positions

style(web): replace shadow with border on copy command button

style(web): use custom character illustrations for testimonial avatars

fix(web): show only built-in modes on landing with gallery link, fix avatars and roadmap