* refactor(REST): remove double classing
BREAKING CHANGE: `REST` and `RequestManager` have been combined, most of the properties, methods, and events from both classes can now be found on `REST`
BREAKING CHANGE: `REST#raw` has been removed in favor of `REST#queueRequest`
BREAKING CHANGE: `REST#getAgent` has been removed in favor of `REST#agent`
* chore: update for /rest changes
BREAKING CHANGE: The REST and RequestManager classes now extend AsyncEventEmitter
from `@vladfrangu/async_event_emitter`, which aids in cross-compatibility
between Node, Deno, Bun, CF Workers, Vercel Functions, etc.
BREAKING CHANGE: DefaultUserAgentAppendix has been adapted to support multiple
different platforms (previously mentioned Deno, Bun, CF Workers, etc)
BREAKING CHANGE: the entry point for `@discordjs/rest` will now differ
in non-node-like environments (CF Workers, etc.)
Co-authored-by: Suneet Tipirneni <77477100+suneettipirneni@users.noreply.github.com>
Co-authored-by: Jiralite <33201955+Jiralite@users.noreply.github.com>
Co-authored-by: suneettipirneni <suneettipirneni@icloud.com>
