enhancement/issue 923 real production import attributes

[thescientist13]

Related Issue

#923 / #1216

See a prototype here - ProjectEvergreen/www.greenwoodjs.dev#74

Summary of Changes

1. Support "real" import attributes for production browser bundles
2. Add documentation

This is mainly a breaking change to plugins.

TODOs

1. get all test cases back to passing for SSR bundles
2. website not bundling correctly on ?type=raw resources in a production build
   
3. smoke this and feature/issue 1257 CSS optimization workflow parity #1258 with downstreams
   • ProjectEvergreen/www.greenwoodjs.dev@329a2d8
   • AnalogStudiosRI/www.analogstudios.net@6dd2ddd
4. update tests for new behavior for browser bundles
   • import instead of "raw" CSS
   • test for output file bundles now (no more in lining / import ref mapping)
5. need to handle inline optimization bundle mapping edge case (see chore/upgrade greenwood v0.30.0 AnalogStudiosRI/www.analogstudios.net#98)
6. should rename this to something like getRollupConfigForBrowser
7. clean up console logging / commented out code / add clarifying comments to rollup.config.js
8. documentation updates with an example of Constructable Stylesheets in styles and assets section
9. update Isomorphic (Reflected) Import Attributes Support #1216 (comment) with the latest state of this implementation - Isomorphic (Reflected) Import Attributes Support #1216 (comment)
10. handle basePath
11. how to exclude module.css? (nice to have)