Support custom type mapping

[SentryMan]

Adds a new annotation to register/import type handlers for custom types.

I'm not sure about the annotation name.

• adds new annotation for mapping
• if the type has no mapping and we know it is not a body (it's annotated by @Header or something) and it also have a constructor that takes a string, a mapping is generated
• you can import external types
• you can use static factory methods

you can use it like:

  @MappedParam
  @MappedParam.Import(Simple2.class)
  record Simple(String name) {}

  record Simple2(String name) {}

  @Form
  @Get("/typeForm")
  String typeForm(Simple s, Simple2 type) {
    return type.name();
  }

  @MappedParam(factoryMethod = "build")
  record Static(String name) {
    static Static build(String name) {
      return null;
    }
  }

  @Get("/typeFormParam")
  String typeFormParam(@FormParam String s, @FormParam Static type) {
    return type.name();
  }

  @Get("/typeQuery2")
  String typeMultiQuery(@QueryParam @Default({"FFA", "PROXY"}) Set<Simple> type) {
    return type.toString();
  }

  record Implied(String name) {}

  @Post("/typeQueryImplied")
  String typeQueryImplied(String s, @QueryParam Implied type) {
    return type.name();
  }

resolves #640 and #539