Remove fs-extra and klaw (#882)

These packages are obsoleted by the promises API to the built-in Node fs
module.  The fs-extra package is also causing problems with broken APIs
that don't behave the same as Node's fs module, and throwing errors
without code properties on them.

packages/controller/src/BaseConnection.ts

@@ -1,5 +1,5 @@
 import path from "path";
-import fs from "fs-extra";
+import fs from "node:fs/promises";
 
 import type Controller from "./Controller";
 import type WsServerConnector from "./WsServerConnector";
@@ -94,10 +94,12 @@ export default class BaseConnection extends lib.Link {
 	async handleModDownloadRequest(request: lib.ModDownloadRequest) {
 		let mod = this.getMod(request);
 		let modPath = path.join(this._controller.config.get("controller.mods_directory"), mod.filename);
+		// Open source file before creating the stream in case it throws.
+		let source = (await fs.open(modPath)).createReadStream();
 
 		let stream = await routes.createProxyStream(this._controller.app);
 		stream.filename = mod.filename;
-		stream.source = fs.createReadStream(modPath);
+		stream.source = source;
 		stream.mime = "application/zip";
 		stream.size = String(mod.size);