lint: add config global to extensions

eslint.config.js

@@ -67,6 +67,7 @@ export default defineConfig([
         languageOptions: {
             globals: {
                 extension: 'readonly',
+                config: 'readonly',
                 ...globals.node,
             },
         },

extensions/api.d.ts

@@ -43,6 +43,7 @@ interface Extension extends RouterMethods {
 declare global {
   // Declare the extension variable
   const extension: Extension;
+  const config: { [k: string | number | symbol]: unknown };
 }
 
 export {};