perf(cli): single-process dev server with Rust CLI wrapper
Replace fork-based architecture with single Node.js process:
- Add Rust CLI wrapper (`crates/next-cli/`) that handles:
- NODE_OPTIONS (memory limits, source maps, inspect)
- WATCHPACK_WATCHER_LIMIT for large projects
- Restart loop (exit code 77) without Node.js overhead
- Simplify next-dev.ts: remove fork(), IPC, child process management
- Simplify start-server.ts: remove NEXT_PRIVATE_WORKER handling
- Add shell entry points (bin/next, bin/next.cmd) that:
- Use native binary when available (~10ms overhead)
- Fall back to Node.js entry point
- Add lazy loading for heavy modules:
- tar (download-swc) - only needed for fallback download
- edge-runtime sandbox - only needed for edge functions
- MCP SDK - only needed when clients connect
- Set up cross-platform release pipeline:
- Build @next/cli-* for 8 platforms in CI
- Publish as optional dependencies
- Update install-native.mjs for development
Saves ~35-50ms on dev server startup by eliminating parent
Node.js process and fork overhead.
🤖 Generated with [Claude Code](https://claude.com/claude-code)
Co-Authored-By: Claude Opus 4.5 <noreply@anthropic.com>
