fix: rename Mathsumoto to Zundamon

Sources/zundamon/Zundamon.swift

@@ -0,0 +1,46 @@
+import Foundation
+import DiscordBM
+import SwiftDotenv
+
+@main
+struct Zundamon {
+    nonisolated(unsafe) static private(set) var ownID: UserSnowflake? = nil
+
+    static func main() async throws {
+        let tmp = Result { try Dotenv.configure() }
+        switch (tmp) {
+            case .success:
+                print("Loaded .env file")
+            case .failure:
+                break
+        }
+
+        let token = ProcessInfo.processInfo.environment["DISCORD_TOKEN"]!
+
+        let bot = await BotGatewayManager(token: token, intents: [.guildMessages, .messageContent])
+
+        await withTaskGroup(of: Void.self) { taskGroup in
+            taskGroup.addTask {
+                await bot.connect()
+                let tmp = try! await bot.client.getOwnUser()
+                ownID = try! tmp.decode().id
+            }
+
+            for await event in await bot.events {
+                taskGroup.addTask {
+                    await EventHandler(event: event, client: bot.client).handleAsync()
+                }
+            }
+        }
+    }
+}
+
+struct EventHandler: GatewayEventHandler {
+    let event: Gateway.Event
+    let client: any DiscordClient
+
+    func onMessageCreate(_ payload: Gateway.MessageCreate) async throws {
+        try await MessageHandler(ctx: payload, client: client).handle()
+    }
+
+}