[Feature in SDK]: Add Booking scope wrappers and integration tests

[fatestr1ngs]

Description

Problem

The SDK does not provide full wrapper coverage for the Bitrix24 Booking scope.

This makes it impossible to work with Booking entities through the SDK in a consistent way, including:

• client type lookup
• resources and resource types
• resource slots
• waitlist entries
• waitlist clients and external data
• bookings
• booking clients and external data

As a result, developers have to call Booking REST methods manually instead of using typed SDK services and result objects.

Proposed solution

Add a dedicated Booking scope to the SDK and implement wrappers for all currently documented Booking REST methods.

The implementation should include:

• a new Booking scope service builder registered in the root ServiceBuilder
• service classes for Booking method groups
• result classes for single-item and list responses
• support for the following method families:
  • booking.v1.clienttype.*
  • booking.v1.resource.*
  • booking.v1.resourceType.*
  • booking.v1.resource.slots.*
  • booking.v1.waitlist.*
  • booking.v1.waitlist.client.*
  • booking.v1.waitlist.externalData.*
  • booking.v1.booking.*
  • booking.v1.booking.client.*
  • booking.v1.booking.externalData.*
• integration tests for the new scope
• dedicated annotation validation tests for result item classes returned by get and list

Acceptance criteria

• A new Booking scope builder is added and registered in the root ServiceBuilder
• All documented Booking REST methods are wrapped by SDK services
• Result classes are added for Booking entities and list responses
• Integration tests are added for the new Booking scope
• Annotation tests are added for result item classes used in get and list
• Booking tests are registered in phpunit.xml.dist
• A Makefile command is added for running Booking integration tests
• Booking-related paths are added to the required linter and test configs
• CHANGELOG.md is updated with the new Booking scope support

Example

No response