Make CSS imports pure so that when imported for side effects, they aren't included in the resulting bundle

[lemonmade]

No description provided.

[lemonmade]

Looked at this. The rollup main part of the rollup plugin is

quilt/packages/rollup/source/features/css.ts

Lines 41 to 49 in f775fdf

	return {
	code: exports
	? `export default JSON.parse(${JSON.stringify(
	JSON.stringify(exports),
	)})`
	: `export default undefined;`,
	map: {mappings: ''},
	moduleSideEffects: 'no-treeshake',
	};

, and with changes to the following, CSS imported by the browser entry is correctly handled:

      return {
        code: exports
          ? `const module = /* #__PURE__ */ JSON.parse(${JSON.stringify(
              JSON.stringify(exports),
            )});\nexport default module;`
          : `export default undefined;`,
        map: {mappings: ''},
        // moduleSideEffects: 'no-treeshake',
      };

However, CSS outside the browser entry point is not preserved.