migrate to typescript, with fixes

webpack.config.js

@@ -0,0 +1,33 @@
+const path = require('path');
+const CopyPlugin = require('copy-webpack-plugin');
+
+module.exports = {
+    mode: 'production',
+    entry: {
+        background: './src/background/index.ts',
+        content: './src/content/index.ts',
+        popup: './src/popup/index.ts',
+    },
+    // devtool: 'inline-source-map',
+    output: {
+        path: path.resolve(__dirname, 'dist'),
+        filename: 'scripts/[name].bundle.js'
+    },
+    module: {
+        rules: [
+            {
+                test: /\.tsx?$/,
+                use: 'ts-loader',
+                exclude: /node_modules/
+            }
+        ]
+    },
+    resolve: {
+        extensions: ['.tsx', '.ts', '.js']
+    },
+    plugins: [
+        new CopyPlugin([
+            { from: '**/*', to: '.', toType: "dir" },
+        ], { context: 'template', logLevel: 'warn' }),
+    ]
+};