[MacrosOnImports][Swiftify] Copy module imports from clang node's module to its Swift macro SourceFile #81859
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Since the _SwiftifyImport peer macro expansion reuses the function signature of the original imported function, it needs to import the same modules as the module where the original clang node resides, to ensure visibility of any symbols that may appear in the signature.
WIP as it does not work for submodules yet, unless the top module reexports the symbols.
rdar://151611573