Add Effect-native core event system (#27415)

packages/core/src/location-layer.ts

@@ -0,0 +1,12 @@
+import { Layer, LayerMap } from "effect"
+import { Location } from "./location"
+import { Catalog } from "./catalog"
+import { PluginBoot } from "./plugin/boot"
+
+export class LocationServiceMap extends LayerMap.Service<LocationServiceMap>()("@opencode/example/LocationServiceMap", {
+  lookup: (ref: Location.Ref) => {
+    const location = Layer.succeed(Location.Service, Location.Service.of(ref))
+    return Layer.mergeAll(Catalog.defaultLayer, PluginBoot.defaultLayer).pipe(Layer.provide(location))
+  },
+  idleTimeToLive: "5 minutes",
+}) {}