Update README.md

Update README.md

docs: upgrade README with thematic ASCII art

update obrain submodule reference

fix(office-hours): remove YC founder discovery funnel from office-hours skill

feat(startup): register /startup skill in root SKILL.md and CLAUDE.md

chore(startup): generate SKILL.md from template

feat(startup): add Phases 3-5 (provisioning, file generation, ship, summary)

feat(startup): add all generator modules (README, project.json, CLAUDE.md, ADR, gitignore, scaffold)

feat(startup): add Stripe, email, monitoring, and CI/CD provisioning modules

feat(startup): add Cloud Run, analytics, and PostHog provisioning modules

feat(startup): add GCP, GitHub, and DNS provisioning modules

feat(startup): add service discovery module

feat(startup): add Phase 2 architecture conversation to main template

feat(startup): add 6 route modules for architecture conversation