fix: use a custom typings directory

Fixes language-tools test failure.
Closes vuejs/language-tools#3759

This is because according to TypeScript documentation,
> Packages in `node_modules/@types` of any enclosing folder are
considered *visible*.

So we can't have `@types` in the root `node_modules` folder, otherwise
ecosystem projects in the `workspace` folder will be able to see them,
and that might affect the type checking result.

package.json

@@ -50,7 +50,6 @@
   },
   "devDependencies": {
     "@antfu/ni": "^0.21.4",
-    "@types/node": "^18.16.19",
     "@typescript-eslint/eslint-plugin": "^5.62.0",
     "@typescript-eslint/parser": "^5.62.0",
     "eslint": "^8.45.0",

tsconfig.json

@@ -13,6 +13,7 @@
 		"useUnknownInCatchVariables": false,
 		"allowSyntheticDefaultImports": true,
 		"lib": ["esnext"],
-		"sourceMap": true
+		"sourceMap": true,
+		"typeRoots": ["./typings/node_modules/@types"]
 	}
 }

typings/package.json

@@ -0,0 +1,9 @@
+{
+  "name": "typings",
+  "version": "0.0.0",
+  "private": true,
+  "description": "Alternative typing root directory for the project in order not to pollute the root node_modules",
+  "devDependencies": {
+    "@types/node": "^18.18.14"
+  }
+}