Update the Vue example

[16adianay]

No description provided.

[Copilot]

Pull request overview

This PR updates/introduces a Vue 3 + TypeScript + Vite example app demonstrating a DevExtreme DropDownBox with search and an embedded TreeList, along with related tooling (ESLint/Stylelint/Prettier/TS configs) and a starter unit test setup.

Changes:

• Added a Vite + Vue Router application scaffold and demo UI components for DropDownBox + TreeList search.
• Introduced shared service utilities for data sources, display expression formatting, and search filter application.
• Added project tooling/configuration for TypeScript project references, ESLint/Stylelint, and Vitest.

Reviewed changes

Copilot reviewed 23 out of 26 changed files in this pull request and generated 6 comments.

Show a summary per file

File	Description
Vue/vite.config.ts	Adds Vite config with Vue plugins and aliases (including DevExtreme ESM alias).
Vue/tsconfig.vitest.json	Adds a TS config intended for Vitest/type-checking.
Vue/tsconfig.json	Adds TS project references wiring.
Vue/tsconfig.config.json	Adds TS config for tooling/config files.
Vue/tsconfig.app.json	Adds TS config for the Vue app sources.
Vue/stylelint.config.mjs	Exposes shared Stylelint config.
Vue/src/views/HomeView.vue	Adds a view wrapper for the demo content component.
Vue/src/service.ts	Adds data source/store setup and search/display helper functions.
Vue/src/router/index.ts	Adds Vue Router setup for the example app.
Vue/src/main.ts	Bootstraps the Vue app and installs the router.
Vue/src/components/HomeContent.vue	Adds the demo page UI (DropDownList + search options).
Vue/src/components/DropDownList.vue	Implements the DropDownBox + embedded TreeList behavior and search handling.
Vue/src/components/tests/Content.spec.ts	Adds a Vitest unit test scaffold for the content component.
Vue/src/assets/main.css	Adds basic global font styling for the viewport.
Vue/src/App.vue	Adds root app shell rendering the router view.
Vue/README.md	Adds Vue example README with build/lint/dev instructions.
Vue/package.json	Adds Vue example dependencies and scripts (build/lint/test/type-check).
Vue/index.html	Adds Vite HTML entrypoint.
Vue/eslint.config.js	Adds ESLint flat config using shared DevExtreme presets.
Vue/env.d.ts	Adds Vite client type reference.
Vue/.vscode/settings.json	Adds VS Code save actions for ESLint fixes.
Vue/.vscode/extensions.json	Recommends Vue tooling extensions.
Vue/.prettierrc.json	Adds Prettier configuration.
Vue/.gitignore	Adds Vue example gitignore entries.

---

💡 Add Copilot custom instructions for smarter, more guided reviews. Learn how to get started.

[DevExpressExampleBot]

Please correct the project and update this pull request by pushing a new commit.

Non-zero exit code when running test file

https://codecentralfarm.devexpress.devx/job/devextreme-dropdownbox-implement-search-for-treelist_25.2.6+/38/console