This is forked from #2941

In short, Google's proposal is at: #2941 (comment)

• classifying features into sugar vs. non-sugar. Sugar features can be implemented anywhere. (E.g 'do-while' loops).
• bundle sugar features in to monotonically increasing shells of functionality
• use Semver conventions of backward compatibility for those increasing shells of functionality

Further discussion

• 2022-06-01 meeting: https://github.com/gpuweb/gpuweb/issues//2941#issuecomment-1164897200
• @kdashg 's proposal for std namespacing and automatically importing them, including a scheme for increasing shells of functionality: https://github.com/gpuweb/gpuweb/issues//2941#issuecomment-1164927025
• 2022-06-28 meeting: https://github.com/gpuweb/gpuweb/issues//2941#issuecomment-1170249066

Temporarily putting this in v1.0 milestone, for triage. I'd like an affirmative discussion about milestone.