feat: upgrade ai-sdk-provider to ^3.4.0 and use generateImage API

docs: correct tech stack used

docs: update qa-agent demo preview

docs: update qa-agent demo link

fix: regenerate lockfile for qa-agent template

feat(templates): add QA agent template with live browser preview

feat(templates): add live demo links to web templates

feat(templates): add Vercel deploy buttons to web templates

feat(templates): add API key dialog for runtime key configuration (#5)

feat(agents): add 4 agent templates

feat(templates): add 4 web templates (#4)

feat(agents): add lead-agent template (#2)

feat(cli): add 'ls' alias for the list command

fix: match llmgateway repo versions (pnpm 10, node 24)

fix: adapt publish config for @llmgateway/cli package