update vanilla config

Author: softmarshmallow

packages/builder-config/framework-vanilla/index.ts

@@ -1,10 +1,13 @@
 import { Language } from "@grida/builder-platform-types";
 import { ComponentOutput } from "../output";
 import type { WebImgAltConfig } from "../platform-web/web-img-alt";
+import type { WebAdditionalCssDeclarationConfig } from "../platform-web/additional-css-declaration";
+
 export interface VanillaComponentOutput extends ComponentOutput {}
 
 export interface VanillaFrameworkConfig {
   framework: "vanilla";
   language: Language.html;
   imgage_alt: WebImgAltConfig;
+  additional_css_declaration?: WebAdditionalCssDeclarationConfig;
 }