Feat build rollup external

[magicdawn]

we can use build.rollupOptions.external to externalize built in modules & electron.

the node_modules/.vite-plugin-electron-renderer/fs.js glue code work when dev (esbuild).
but can cause problem when build (rollup)

like fs-extra > graceful-fs package, without rollup external
will cause error

because

• raw `require('fs')
• map to node_modules/.vite-plugin-electron-renderer/fs.js esmodule
• rollup/plugin-commonjs default use var require$$0$7 = /* @__PURE__ */ getAugmentedNamespace(fs$o);
• the getAugmentedNamespace define a getter close on fs
• so when graceful-fs try to overwrite fs.close, cause the error present by the image

the error can be prevented by set { requireReturnsDefault: 'prefer' / 'auto' } options of @rollup/plugin-commonjs to get rid of Object.defineProperty
but it's better to external these modules.

AND background:
magicdawn/magicdawn#132 (comment)

[caoxiemeihao]

This is really a problem. Thank you for your PR 😄