Support composable Methods

[paulpdaniels]

Is your feature request related to a problem? Please describe.

It's is clumsy it zio-http 3.x to encode a route that can match multiple methods. There are effectively only two options:

1. Create multiple routes for each method:

Routes(
  Method.GET / "foo" -> handler,
  Method.PUT / "foo" -> handler
)

2. Use the ANY method to capture all methods.

1 makes the declaration overly verbose especially if you have to enumerate many of the methods. While 2 is subject to confusing precedence rules.

Describe the solution you'd like

I would like the ability to define multiple methods for a single handler, this is useful in protocols like GraphQL where users may submit via either GET or POST. The easiest way I can think of doing this is to provide a | method that declares that a route will match either of the methods. The internals of this could probably be achieved with a bit mask, but it would be a breaking change to the current implementation, which doesn't have a "composite" concept.

Then the above could be written:

Routes(
  Method.GET | Method.PUT / "foo" -> handler
)