Add Support for Retrieving User Profile Effects in the Discord API

[EntchenEric]

Currently, the Discord API allows developers to retrieve user avatar decorations through the User object. However, there is no support for retrieving a user's Profile Effect, despite it being a notable visual feature of profiles. Adding this capability would enhance the API's utility for bots and integrations that aim to display or interact with user profiles comprehensively.

Use Cases:

• User Profile Displays: Bots and third-party integrations could use this field to accurately represent user profiles.
• Custom Features: Developers could build features that consider Profile Effects for gamification, user recognition, or themed events.
• Profile Customization Tools: Developers could create tools to preview and suggest profile setups that incorporate both avatar decorations and Profile Effects.