feat: implement automatic serverless fallback to Hugging Face router

chore: add root README with Hugging Face Space configuration

chore: add root Dockerfile for Hugging Face Spaces deployment

feat: dashboard UI overhaul + auth flow + auto-company-load

refactor: replace sequential 3-node pipeline with parallel 13-node multi-agent architecture

build: untrack local documents and add them to .gitignore

feat: initial commit - core multi-agent compiler engine and frontend UI