Add coroutineScope property to event handlers

This allows your event handlers to be launched in a coroutine scope if needed.

kord-extensions/src/main/kotlin/com/kotlindiscord/kord/extensions/ExtensibleBot.kt

@@ -346,17 +346,17 @@ public open class ExtensibleBot(
  */
  public inline fun <reified T : Event> on(
  launch: Boolean = true,
- scope: CoroutineScope = this.getKoin().get<Kord>(),
+ scope: CoroutineScope = kordRef,
  noinline consumer: suspend T.() -> Unit,
  ): Job =
  events.buffer(Channel.UNLIMITED)
  .filterIsInstance<T>()
  .onEach {
  runCatching {
- if (launch) kordRef.launch { consumer(it) } else consumer(it)
+ if (launch) scope.launch { consumer(it) } else consumer(it)
  }.onFailure { logger.catching(it) }
  }.catch { logger.catching(it) }
- .launchIn(scope)
+ .launchIn(kordRef)
 
  /**
  * @suppress
@@ -515,7 +515,7 @@ public open class ExtensibleBot(
  */
  @Throws(EventHandlerRegistrationException::class)
  public inline fun <reified T : Event> registerListenerForHandler(handler: EventHandler<T>): Job {
- return on<T> {
+ return on<T>(scope = handler.coroutineScope) {
  handler.call(this)
  }
  }

kord-extensions/src/main/kotlin/com/kotlindiscord/kord/extensions/events/EventHandler.kt

@@ -21,6 +21,7 @@ import com.kotlindiscord.kord.extensions.utils.getKoin
 import dev.kord.core.Kord
 import dev.kord.core.event.Event
 import io.github.oshai.kotlinlogging.KotlinLogging
+import kotlinx.coroutines.CoroutineScope
 import kotlinx.coroutines.Job
 import org.koin.core.component.inject
 import java.util.*
@@ -73,6 +74,13 @@ public open class EventHandler<T : Event>(
  /** Cached locale variable, stored and retrieved by [getLocale]. **/
  public var resolvedLocale: Locale? = null
 
+ /**
+ * Coroutine scope used to launch this event handler when handling a new event.
+ *
+ * Defaults to the current [Kord] instance.
+ */
+ public var coroutineScope: CoroutineScope = kord
+
  /**
  * An internal function used to ensure that all of an event handler's required arguments are present.
  *