Started to add the middleware API for inegrate the Desktop app with the figma front-end app

Author: Chugunov Roman

@types/renderer/index.d.ts

@@ -1 +1,14 @@
-interface AppProps { }
+interface AppProps { }
+
+interface Window extends EventTarget, WindowTimers, WindowSessionStorage, WindowLocalStorage, WindowConsole, GlobalEventHandlers, IDBEnvironment, WindowBase64, GlobalFetch {
+    __figmaDesktop: {
+        version: number;
+        fileBrowser: boolean;
+
+        postMessage(name: string, args: Array<string>, transferList: Array<string>): void;
+        promiseMessage(name: string, args: Array<string>, transferList: Array<string>): Promise<void>
+        setMessageHandler(handler: Function): void;
+    };
+}
+
+declare var window: Window;

config/webpack.config.renderer.js

@@ -5,6 +5,11 @@ const path = require('path');
 const rootFolder = process.cwd();
 
 const dev = {
+
+    entry: {
+        '../middleware/web': path.resolve(rootFolder, 'src/middleware/web.ts')
+    },
+
     module: {
         rules: [
             {