refactor: rename controllers to handlers and handlers to helpers (#660)

* refactor: rename controllers to handlers and handlers to helpers

* fmt

src/handlers/guilds/GUILD_MEMBER_ADD.ts

@@ -0,0 +1,19 @@
+import { eventHandlers } from "../../bot.ts";
+import { DiscordPayload, GuildMemberAddPayload } from "../../types/mod.ts";
+import { structures } from "../../structures/mod.ts";
+import { cacheHandlers } from "../../cache.ts";
+
+export async function handleGuildMemberAdd(data: DiscordPayload) {
+  const payload = data.d as GuildMemberAddPayload;
+  const guild = await cacheHandlers.get("guilds", payload.guild_id);
+  if (!guild) return;
+
+  guild.memberCount++;
+  const memberStruct = await structures.createMemberStruct(
+    payload,
+    payload.guild_id,
+  );
+  await cacheHandlers.set("members", memberStruct.id, memberStruct);
+
+  eventHandlers.guildMemberAdd?.(guild, memberStruct);
+}