Removed unnecessary IntelliJ IDEA (`.idea`) configuration files to clean up the repository. Added new sell-related functionality including the SellCryptoPage, SellModal, SellForm, and updated relevant types and UI components.
Integrate react-query by adding `QueryClientProvider` to the application. This involves updating dependencies, wrapping existing providers with `QueryProvider`, and refactoring the `account-info` module to utilize new hooks and APIs.
Initial setup of the Neptune frontend project, including Dockerfile, environment files, TypeScript configuration, and essential components. Added basic page structures for dashboard and wallet, and configured Tailwind CSS and postcss.
