Move JS monorepo packages to folder

packages/plugin-runtime/src/EventChannel.ts

@@ -0,0 +1,21 @@
+import type { InternalEvent } from '@yaakapp/api';
+import EventEmitter from 'node:events';
+import type { EventStreamEvent } from './gen/plugins/runtime';
+
+export class EventChannel {
+  emitter: EventEmitter = new EventEmitter();
+
+  emit(e: InternalEvent) {
+    this.emitter.emit('__plugin_event__', { event: JSON.stringify(e) });
+  }
+
+  async *listen(): AsyncGenerator<EventStreamEvent> {
+    while (true) {
+      yield new Promise<EventStreamEvent>((resolve) => {
+        this.emitter.once('__plugin_event__', (event: EventStreamEvent) => {
+          resolve(event);
+        });
+      });
+    }
+  }
+}