Craft: local `pnpm lint` doesn't catch CI's prettier check — use `pnpm format:check`

Trap: pnpm lint (ESLint only) passing locally looks like a full pre-push check, but CI's 'Lint fixes' job runs pnpm format:check (prettier --check .) separately — a file can pass ESLint yet fail CI on pure formatting (e.g. line-wrapping in src/targets/__tests__/cloudflare.test.ts). Fix: run pnpm format:check (or prettier --write <file>) locally before pushing, not just pnpm lint. Confirmed in getsentry/craft PR #846.