feat: remove datastores and implement Managers (#3696)

* Initial commit: add 5 initial managers

- Base manager
- GuildChannelManager
- MessageManager
- PresenceManager
- Reaction Manager
- Added LimitedCollection

* Add GuildEmojiManager, various fixes

* Modify some managers and add guildmembermanager

* Initial integration

* Delete old stores

* Integration part two, removed LRUCollection

- Most of the integration has been finished
- TODO typings
- Removed LRUCollection, needless sweeping

* Typings + stuff i somehow missed in ChannelManager

* LimitedCollection typings/ final changes

* Various jsdoc and syntactical fixes, Removed Util.mixin()

* tslint fix

* Grammatical and logical changes

* Delete temporary file placed by mistake

* Grammatical changes

* Add missing type

* Update jsdoc examples

* fix: ChannelManager#remove should call cache#delete not cache#remove

* fix recursive require

* Fix missed cache in util

* fix: more missed cache

* Remove accidental _fetchMany change from #3645

* fix: use .cache.delete() over .remove()

* fix: missing cache in ReactionCollector

* fix: missed cache in client

* fix: members is a collection not a manager

Co-Authored-By: Sugden <28943913+NotSugden@users.noreply.github.com>

* fix: various docs and cache fixes

* fix: missed cache

* fix: missing _roles

* Final testing and debugging

* LimitedCollection: return the Collection instead of undefined on .set

* Add cache to BaseManager in typings

* Commit fixes i forgot to stage yesterday

* Update invite events

* Account for new commit

* fix: MessageReactionRemoveAll should call .cache.clear()

* fix: add .cache at various places, correct return type

* docs: remove mentions of 'store'

* Add extra documented properties to typings

Co-authored-by: Sugden <28943913+NotSugden@users.noreply.github.com>
Co-authored-by: SpaceEEC <spaceeec@yahoo.com>

src/util/LimitedCollection.js

@@ -0,0 +1,29 @@
+'use strict';
+
+const Collection = require('./Collection.js');
+
+/**
+ * A Collection which holds a max amount of entries. The first key is deleted if the Collection has
+ * reached max size.
+ * @extends {Collection}
+ * @param {number} [maxSize=0] The maximum size of the Collection
+ * @param {Iterable} [iterable=null] Optional entries passed to the Map constructor.
+ */
+class LimitedCollection extends Collection {
+  constructor(maxSize = 0, iterable = null) {
+    super(iterable);
+    /**
+     * The max size of the Collection.
+     * @type {number}
+     */
+    this.maxSize = maxSize;
+  }
+
+  set(key, value) {
+    if (this.maxSize === 0) return this;
+    if (this.size >= this.maxSize && !this.has(key)) this.delete(this.firstKey());
+    return super.set(key, value);
+  }
+}
+
+module.exports = LimitedCollection;