typed route only supports 1 method per route

[vlovich]

If two #[route] functions have the same path but different methods they respond to, xitca fails to construct. However, #[route] doesn't have a way to request multiple paths. I believe I noticed a todo in the macro to support multiple methods.

[fakeshadow]

name collision from function routes with route attribute macro can be an complicated issue due to lack of global context.

function route with multiple method key is trivial in comparison and in indeed it's in the TODOs from xitca-codegen.