feat: external collection package (#2934)

* Use external collection package

* Complete typings

* Document properly base collection class

* Add clone since sort is now in-place

* Update for latest changes to package

* Fix whitespace

* Update docs link

* Oops

* Update Collection.js

* Update index.d.ts

package.json

@@ -35,6 +35,7 @@
   "runkitExampleFilename": "./docs/examples/ping.js",
   "unpkg": "./webpack/discord.min.js",
   "dependencies": {
+    "@discordjs/collection": "^0.1.0",
     "abort-controller": "^3.0.0",
     "form-data": "^2.3.3",
     "node-fetch": "^2.3.0",