Fixed `@woocommerce/ai` Build

It was missing some webpack plugins.

packages/js/ai/package.json

@@ -59,6 +59,7 @@
 		"eslint": "^8.32.0",
 		"jest": "~27.5.1",
 		"jest-cli": "~27.5.1",
+		"mini-css-extract-plugin": "^2.6.0",
 		"postcss": "^8.4.7",
 		"postcss-loader": "^4.3.0",
 		"react": "^17.0.2",
@@ -69,7 +70,8 @@
 		"ts-jest": "~29.1.1",
 		"typescript": "^5.1.6",
 		"webpack": "^5.70.0",
-		"webpack-cli": "^3.3.12"
+		"webpack-cli": "^3.3.12",
+		"webpack-rtl-plugin": "^2.0.0"
 	},
 	"scripts": {
 		"turbo:build": "pnpm run build:js && pnpm run build:css",