[DominusKelvin]

Summary

• expand Tailwind v4 guidance with @rsbuild/plugin-tailwindcss setup beside framework plugins, plain-CSS entry guidance, and Tailwind source scanning controls
• document React Compiler opt-in paths for React 19 and React 17/18, including react-compiler-runtime and diagnostics guidance
• clarify SSR/Node externalization boundaries, resource import recipes, import.meta.glob tradeoffs, dynamic ports, rollback, and current Rsbuild/Rspack target versions
• add tests proving Shipwright keeps default browser builds bundled and that the documented Rsbuild 2 resource import recipes build successfully

Tests

• npm test
• npx prettier --check README.md tests/unit/rsbuild-config.test.js

Closes #26
Closes #27
Closes #28
Closes #29
Closes #30