stage2: implement exporting using field access (#13136)

This implements `@export(a.b, .{..});` in semantic analysis,
allowing users to directly export a variable from a namespace.

* add test case for exporting using field access
1f196b9e2fLuuk de Gram committed on 10/12/2022, 8:38:07 AM· committed by GitHubparent6225855
2 files changedLine totals unavailable