Add core structure for DeltaChat port

src/quadnite_bot/__main__.py

@@ -0,0 +1,11 @@
+from deltabot_cli import BotCli
+from deltachat2 import events
+
+from quadnite_bot.command_registry import dispatcher
+
+def main():
+    cli = BotCli("quadnite-bot")
+
+    cli.on(events.NewMessage)(dispatcher)
+
+    cli.start()