Add ability to add custom suggests for userfields in IDE

[mesilov]

Description

Now SDK has annotated standard fields in result types.
https://github.com/bitrix24/b24phpsdk/blob/main/src/Services/CRM/Contact/Result/ContactItemResult.php#L25-L74

SDK needs an opportunity to add custom user-types for IDE suggests

Possible Solution

Use EventDispatcher for custom event OnReturnResultPrepeared to override container class for result.

Make examples for use cases

• CustomTypes for Lead, Contact, SmartProcess (crm-item)
• Example for event subscriber
• Tests for corner-cases
• Default loader for override class map ruleset