Add types file

src/types.d.ts

@@ -0,0 +1,9 @@
+import type {NetContext} from "@welshman/net"
+import type {AppContext} from "@welshman/app"
+
+declare module "@welshman/lib" {
+  interface Context {
+    net: NetContext
+    app: AppContext
+  }
+}