Add strong schema support about wire

[Horusiath]

In case if this is still a matter - I'd say, that the better option would be to add something like mapping class i.e.:

class MyMessageSchema : WireSchema<MyMessage>
{
    public MyMessageSchema()
    {
        TypeId(0);
        Field(0, m => m.SomeProperty);
        Field(1, m => m.SomeOtherProperty);
    }
}

Why this way? Having a mapping class effectively splits a data, contract and its implementation. This means that you can create a schema for messages defined in assemblies, you don't have an access to or where you don't want to introduce a Wire as a dependency.

[rogeralsing]

Closing as out of scope for now, might reopen later