[Decorator] Create alias to Header => HeaderParams. Improve Header decorator to manage header response.

[Romakita]

No description provided.

[Romakita]

To maintain a coherence with other decorators like @BodyParams, @QueryParam, etc... I proposed to create an alias @HeaderParams.

@Header will be used to set the header for the response. @Header will stay compatible with old implementation.

Example :

@Controller("/calendars")
export class CalendarCtrl {

   @Get("/:id")
   @Header( "Content-Type", "application/json")
    public get(
          @PathParam('id'), 
          @Header('authorization') token: string 
     ): ICalendar {

        return <ICalendar> {id: request.params.id, name: "test"};
    }
}

// OR

@Controller("/calendars")
export class CalendarCtrl {

   @Get("/:id")
   @Header( "Content-Type", "application/json")
    public get(
          @PathParam('id'), 
          @HeaderParam('authorization') token: string 
     ): ICalendar {

        return <ICalendar> {id: request.params.id, name: "test"};
    }
}

// OR

@Controller("/calendars")
export class CalendarCtrl {

    @Get("/:id")
    @Header({"Content-Type": "application/json", "status": 200})
    public get(): ICalendar {

        return <ICalendar> {id: request.params.id, name: "test"};
    }
// or
    @Get("/:id")
    @Header("Content-Type",  "application/json")
    @Header("status",  200)
    public get(): ICalendar {

        return <ICalendar> {id: request.params.id, name: "test"};
    }
}