Feat/implement thread events

[PandaGuerrier]

---

Add Full Support for Threads

This Pull Request introduces comprehensive thread support to the project. Below is a summary of the key changes:

Thread Features:

• Initial implementation of threads with event handling for thread-related operations.
• Added events for thread member management: threadMemberAdd, threadMemberRemove, and threadMemberUpdate.
• Introduced the ThreadsManager to handle threads, replacing the use of a regular map.
• Added thread list synchronization and the associated events.
• Created serializers and packets for managing threads, including adding, deleting, synchronizing, and updating threads.
• Refactored thread handling within channels to use maps instead of lists.
• Adjusted cache and keys for optimized thread management.
• Set specific permissions for threads.

General Improvements:

• Refactored channels to use serverId instead of guildId.
• Fixed several bugs and adjusted existing logic to support threads.
• Removed unnecessary code and packages to streamline the project.
• Minor fixes in message handling, including nullable message reference management.

This PR fully integrates threads with optimized management, custom events, and improved support for thread-related operations.

---