- Revive some of the removed cache integration logic in `cmdTranslateC` now that `translate-c` can return error bundles
- Fixup inconsistent path separators (on Windows) when building the aro include path
- Move some error bundle logic from resinator into aro.Diagnostics
- Add `ErrorBundle.addRootErrorMessageWithNotes` (extracted from resinator)
This is f5fb720a5399ee98e45f36337b2f68a4d23a783c plus ehaas's nonnull
attribute pull request currently at 4b26cb3ac610a0a070fc43e43da8b4cdf0e9101b
with zig patches intact.