feat(rsc): show warning for non optimized cjs

[hi-ogawa]

Description

• Related Improve optimizeDeps.include heuristics to ensure popular cjs packages to be automatically optimized #610

Just a slight reassurance to avoid entirely cryptic ReferenceError: module is not defined server error.

Example when removing this line (explicit include example added by #611)

vite-plugin-react/packages/plugin-rsc/examples/basic/vite.config.ts

Line 157 in 9444846

'@vitejs/test-dep-transitive-cjs > use-sync-external-store/shim/index.js',

7:14:05 PM [vite] (ssr) warning: [vite-rsc] found non-optimized CJS dependency in 'ssr' environment. It is recommended to manually add the dependency to 'environments.ssr.optimizeDeps.include'.
  Plugin: rsc:detect-non-optimized-cjs
  File: /home/hiroshi/code/others/vite-plugin-react/node_modules/.pnpm/[email protected][email protected]/node_modules/use-sync-external-store/shim/index.js?v=5b54ec8a

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TODO

• test
• option (enabled by default)
• transform cjs into esm on the fly (later)