Added downloading mods from Modrinth

src/io/download_task.d.ts

@@ -0,0 +1,8 @@
+declare global {
+    type DownloadTask = {
+        fileName: string,
+        url: string
+    }
+}
+
+export {}

src/io/file_downloder.ts

@@ -0,0 +1,21 @@
+import path from "path";
+import * as https from "https";
+import {createWriteStream} from "fs";
+import DownloadError from "../errors/download_error.js";
+
+
+export default class FileDownloader {
+    private static readonly MODS_FOLDER_PATH: string = path.join("mods");
+
+    static downloadMod(task: DownloadTask): void {
+        https.get(task.url, res => {
+            const filePath = path.join(this.MODS_FOLDER_PATH, task.fileName);
+            const writeStream = createWriteStream(filePath);
+            res.pipe(writeStream);
+            writeStream.on("finish", () => writeStream.close());
+            writeStream.on('error', () => {
+                throw new DownloadError(`Failed to download ${task.fileName} from ${task.url}`)
+            })
+        })
+    }
+}