feat: redesign dashboard with charts, seed script, fix .env tracking

fix: untrack .env from git, add .env.example; extend dashboard stats

feat: client-device relation, rename variant→release, add Projects section

fix(db): add DB_SSLMODE env var support, required for Neon

fix(db): default port to 5432, validate required env vars on startup

fix(ts): remove unused useEffect import in LicenseGeneratorModal

feat(ui) : updated UI & UX for best user friendly experience

fix(ui) : fixed the broken api calls

feat(fix): added the new license manager using go/react