Move Eventhandling around.

I still want to use fabric still "array backed" events, but these here are just a bit easier to use from kotlin.

src/main/kotlin/moe/nea/notenoughupdates/util/MinecraftDispatcher.kt

@@ -0,0 +1,22 @@
+package moe.nea.notenoughupdates.util
+
+import kotlinx.coroutines.CoroutineDispatcher
+import kotlinx.coroutines.ExperimentalCoroutinesApi
+import kotlinx.coroutines.Runnable
+import kotlin.coroutines.CoroutineContext
+import net.minecraft.client.MinecraftClient
+
+object MinecraftDispatcher : CoroutineDispatcher() {
+    @ExperimentalCoroutinesApi
+    override fun limitedParallelism(parallelism: Int): CoroutineDispatcher {
+        throw UnsupportedOperationException("limitedParallelism is not supported for MinecraftDispatcher")
+    }
+
+    override fun isDispatchNeeded(context: CoroutineContext): Boolean =
+        !MinecraftClient.getInstance().isOnThread
+
+
+    override fun dispatch(context: CoroutineContext, block: Runnable) {
+        MinecraftClient.getInstance().execute(block)
+    }
+}