[HospitalitySkill] Add dialog for room service and update request item dialog

[litofish]

Purpose

• To add a new feature for ordering room service.
• Update RequestItem dialog to do item availability checking in HotelService, and add an adaptive card

Changes

For room service - The basic flow is that someone can either ask to see a specific menu (lunch, dinner, etc.) and then order, or can order from the start and skip seeing a menu. The RoomServiceMenu JSON has all the menu information, which is used to create the menu adaptive card and for checking item availability. Once ordered, an adaptive card with the ordered items and total bill is shown.

Checklist

General

• I have commented my code, particularly in hard-to-understand areas
• I have added or updated the appropriate tests
• I have updated related documentation

Bots

• I have validated that new and updated responses use appropriate Speak and InputHint properties to ensure a high-quality speech-first experience
• I have replicated language model changes across the English, French, Italian, German, Spanish, and Chinese .lu files and validated that deployment is successful