Add typescript

vitest.config.ts

@@ -0,0 +1,25 @@
+import {defineConfig} from 'vitest/config';
+import vuePlugin from '@vitejs/plugin-vue';
+import {stringPlugin} from 'vite-string-plugin';
+import {resolve} from 'node:path';
+
+export default defineConfig({
+  test: {
+    include: ['web_src/**/*.test.js'],
+    setupFiles: ['web_src/js/vitest.setup.js'],
+    environment: 'happy-dom',
+    testTimeout: 20000,
+    open: false,
+    allowOnly: true,
+    passWithNoTests: true,
+    globals: true,
+    watch: false,
+    alias: {
+      'monaco-editor': resolve(import.meta.dirname, '/node_modules/monaco-editor/esm/vs/editor/editor.api'),
+    },
+  },
+  plugins: [
+    stringPlugin(),
+    vuePlugin(),
+  ],
+});