refactor: introduce pnpm workspace (#34241)

Co-authored-by: yyh <yuanyouhuilyz@gmail.com>
Co-authored-by: autofix-ci[bot] <114827586+autofix-ci[bot]@users.noreply.github.com>

dev/setup

@@ -24,5 +24,4 @@ cp "$MIDDLEWARE_ENV_EXAMPLE" "$MIDDLEWARE_ENV"
 cd "$ROOT/api"
 uv sync --group dev
 
-cd "$ROOT/web"
-pnpm install
+pnpm --dir "$ROOT" install