docs: add introduction page

docs/src/en/introduction.md

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+# Introduction
+
+**Vutron** is a preconfigured template for developing `Electron` cross-platform desktop apps. It uses `Vue 3` and allows you to build a fast development environment with little effort.
+
+## Advantages of use
+
+- ✅ You can build immediately without any presets, so you can develop quickly.
+- ✅ It is being maintained quickly to be compatible with the latest `Vue` and `Electron`, as well as many modules.
+- ✅ There is no need to worry about layout and data management by using various additional templates.
+
+## Features
+
+- ⚡️ Rapid development through hot-reload
+- ⚡️ Cross-platform development and build support
+- ⚡️ Support for automated application testing
+- ⚡️ TypeScript support
+- ⚡️ Multilingual support
+- ⚡️ Support for themes (dark & light)
+- ⚡️ Basic layout manager
+- ⚡️ Global state management through the Pinia store
+- ⚡️ Quick support through the GitHub community and official documentation