Added remotefilesource types (DH-20578)

Author: bmingles

src/dh/modules.d.ts

@@ -8,3 +8,35 @@ declare module '@deephaven-enterprise/jsapi-types' {
 }
 
 export {};
+
+/**
+ * TODO: These types were copied from core until deephaven/deephaven-core#7451
+ * merges / is released. Then we can do a version bump of jsapi-types and remove
+ * this module augmentation.
+ */
+declare module '@deephaven/jsapi-types' {
+  namespace dh {
+    interface CoreClient {
+      getRemoteFileSourceService(): Promise<dh.remotefilesource.RemoteFileSourceService>;
+    }
+  }
+
+  namespace dh.remotefilesource {
+    interface ResourceRequestEvent {
+      respond(content: string | Uint8Array | undefined | null): void;
+      get resourceName(): string;
+    }
+
+    class RemoteFileSourceService {
+      static readonly EVENT_REQUEST_SOURCE: string;
+
+      addEventListener<T>(
+        name: string,
+        callback: (e: dh.Event<T>) => void
+      ): () => void;
+
+      setExecutionContext(resourcePaths?: string[]): Promise<boolean>;
+      close(): void;
+    }
+  }
+}