feat: Add Channels cache to Client with ObjectCache implementation

src/services/caches/channels.ts

@@ -0,0 +1,10 @@
+import { API } from "../api";
+import { Processor } from "../processor";
+import { Channel } from "../../types/channel";
+import { ObjectCache } from "./cache";
+
+export class Channels extends ObjectCache<Channel, Channel> {
+    constructor(api: API, processor: Processor) {
+        super(api, processor, 'channels', Channel, ['CHANNEL_CREATE', 'CHANNEL_UPDATE']);
+    }
+}