std: dwarf namespace reorg

std.debug.Dwarf is the parsing/decoding logic. std.dwarf remains the
unopinionated types and bits alone.

If you look at this diff you can see a lot less redundancy in
namespaces.
e5b46eab3bAndrew Kelley committed on 8/1/2024, 8:56:12 PMparent377274e
10 files changedLine totals unavailable