This fixes main compile issues. Problems that remain:
* json is borked for objects with key/value keys that need to be coerced
* currently all request structures need an http_query declaration, and this may be a hard requirement
* need to revisit all the places where we are reading http response bodies
* there are 35 compile errors that do not have reference traces and will take a while to track down
This will use the Vulkan xml parser to parse data, then
massage that into a passed type. It uses code patterned
off the standard library Json parser to do the work.
The final, commented test is exposing a compiler bug that
needs to be reduced and sent to the zig team. Initial reports
from IRC indicate that the team is not focusing on compiler
bugs until stage 2 is done (hopefully May 2022)
