AstGen: decouple from Module/Compilation

AstGen is now completely independent from the rest of the compiler. It
ingests an AST tree and produces ZIR code as the output, without
depending on any of the glue code of the compiler.
a973c362e5Andrew Kelley committed on 5/3/2021, 12:08:19 AMparentd5f77c0
6 files changedLine totals unavailable