Revert "Remove dupe config file" (#34)

This reverts commit aae4f9e.

client/.vscode-test.mjs

@@ -0,0 +1,7 @@
+// https://github.com/microsoft/vscode-test-cli
+import { defineConfig } from '@vscode/test-cli';
+export default defineConfig({
+	extensionDevelopmentPath: '..',
+	files: 'dist/**/*.test.js',
+	version: '1.92.0',
+});