Consider adding typealiases for Operations.*.Input.* types for referenced types

[czechboy0]

When all types are inline, you get consistent names for all operations:

• Operations.<operationID>.Input.Path
• Operations.<operationID>.Input.Query
• Operations.<operationID>.Input.Headers
• Operations.<operationID>.Input.Cookies
• Operations.<operationID>.Input.Body

And similar for Operations.<operationID>.Output.

When using reusable types for requestBody, parameter, and response, however, these can point directly to e.g. Components.RequestBodies.Foo, etc, which breaks the symmetry.

Consider emitting a typealias here that would make all the names predictable, e.g.

enum Operations {
  enum <operationId> {
    struct Input {
      typealias Body = Components.RequestBodies.Foo
    }  
  }
}