feat(bot): Add guildUnavailable event, fixes #3028 (#3044)

* feat(bot): Add guildUnavailable event, fixes #3028

* Update packages/bot/src/handlers/guilds/GUILD_DELETE.ts

---------

Co-authored-by: Skillz4Killz <23035000+Skillz4Killz@users.noreply.github.com>

packages/bot/src/bot.ts

@@ -196,6 +196,7 @@ export interface EventHandlers {
   guildBanRemove: (user: User, guildId: bigint) => unknown
   guildCreate: (guild: Guild) => unknown
   guildDelete: (id: bigint, shardId: number) => unknown
+  guildUnavailable: (id: bigint, shardId: number) => unknown
   guildUpdate: (guild: Guild) => unknown
   raw: (data: DiscordGatewayPayload, shardId: number) => unknown
   roleCreate: (role: Role) => unknown

packages/bot/src/handlers/guilds/GUILD_DELETE.ts

@@ -3,5 +3,8 @@ import type { Bot } from '../../bot.js'
 
 export async function handleGuildDelete(bot: Bot, data: DiscordGatewayPayload, shardId: number): Promise<void> {
   const payload = data.d as DiscordUnavailableGuild
+
+  if (payload.unavailable) return bot.events.guildUnavailable?.(bot.transformers.snowflake(payload.id), shardId);
+
   bot.events.guildDelete?.(bot.transformers.snowflake(payload.id), shardId)
 }