add declaration.d.ts

packages/remark-lsx/src/@types/declaration.d.ts

@@ -0,0 +1,2 @@
+// prevent TS2307: Cannot find module './xxx.module.scss' or its corresponding type declarations.
+declare module '*.scss';

packages/remark-lsx/tsconfig.json

@@ -4,6 +4,9 @@
   "compilerOptions": {
     "jsx": "react-jsxdev",
 
+    "plugins": [{ "name": "typescript-plugin-css-modules" }],
+
+    "typeRoots": ["./src/@types"],
     "types": [
       "vitest/globals"
     ],