feat: implement basic public api

packages/webpack5/src/stubs/default.config.stub.js

@@ -0,0 +1,11 @@
+const webpack = require("@nativescript/webpack");
+
+module.exports = (env) => {
+	webpack.init(env);
+
+	// todo: comments for common usage
+
+	return webpack.resolveConfig();
+};
+
+