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/structures/MessageMentions.js

@@ -71,7 +71,7 @@ class MessageMentions {
       } else {
         this.roles = new Collection();
         for (const mention of roles) {
-          const role = message.channel.guild.roles.get(mention);
+          const role = message.channel.guild.roles.cache.get(mention);
           if (role) this.roles.set(role.id, role);
         }
       }
@@ -156,7 +156,7 @@ class MessageMentions {
     this._channels = new Collection();
     let matches;
     while ((matches = this.constructor.CHANNELS_PATTERN.exec(this._content)) !== null) {
-      const chan = this.client.channels.get(matches[1]);
+      const chan = this.client.channels.cache.get(matches[1]);
       if (chan) this._channels.set(chan.id, chan);
     }
     return this._channels;
@@ -175,7 +175,7 @@ class MessageMentions {
   has(data, { ignoreDirect = false, ignoreRoles = false, ignoreEveryone = false } = {}) {
     if (!ignoreEveryone && this.everyone) return true;
     if (!ignoreRoles && data instanceof GuildMember) {
-      for (const role of this.roles.values()) if (data.roles.has(role.id)) return true;
+      for (const role of this.roles.values()) if (data.roles.cache.has(role.id)) return true;
     }
 
     if (!ignoreDirect) {