This pull request refers to v2 of Wumpcord, which completely refractors all entities, caching methods, documents everything, and a complete API overhaul

Additions

• Added AbstractEntityCache which inherits 2 built-in methods: NoopEntityCache and MemoryCache.
• Added Guild integration support
• Extensions API 🎉
• Compression support 🎉
• Moved REST to it's own standalone package
• Added new methods and getters to classes

Fixes

• Documentation on all classes, methods, accessors, and parameters (TypeScript Rewrite (sub-issue): Documentation #61)
• Reduce bundle size without declaration: true in tsconfig.json and removing all Event-related classes
• Refractored & renamed a lot of functions

Removed

• WebSocketOptions.intents (deprecated since v1.2.0, removed since v2)
• WebSocketOptions.guildSubscriptions - Obsolete due to intents
• InteractionClient due to the WebSocketClient having the interactions helper by default
• MessageCollector due to it not being used as much
• All Event-related classes
  • It felt right to remove this and to use entities instead of using getters from that specific Event class