refactor: Source code update

[Bin-Huang]

This is a major update that I've been working on for a long time, aiming to bring the current repository up to a newer version of the official Chatbox release. This update is the result of countless refactors and optimizations over the past year, essentially a complete rewrite of the current repository.

Here's a quick overview of what's new:

1. Framework Migration: Switched from Tauri to Electron. This change was made because Tauri heavily relies on the user's OS Webview Runtime, which proved unstable and unreliable in production. I gathered a lot of feedback from Windows and Linux users, and most issues stemmed from the Tauri framework itself, which was hard to fix.
2. State Management and Styling: Add Jotai for state management and TailwindCSS for styling, making the code easier to maintain.
3. UI Redesign: Completely redesigned and implemented a new user interface to enhance visual appeal and user experience.
4. Development Infrastructure: Set up a more developer-friendly infrastructure for building, compiling, and packaging, addressing common development challenges mentioned by the community.
5. Feature Optimization: Refactored, optimized, and rewrote every feature and code file to improve user interaction and performance.

In essence, this is an entirely new codebase compared to the previous version. I've decided to keep it open-source as a contribution to the community.

To avoid any confusion, I want to clarify that this version doesn't include many new features that have been released. The main goal of this PR is to update the core of the application, fix existing issues, and improve basic user experience and performance, paving the way for future updates and iterations. This repository might become the community version of Chatbox, distinct from the official Chatbox release.

[Bin-Huang]

This version also improves the development and build instructions, making them simpler and more stable.

1. Clone the repository

2. Install the required dependencies

npm install

3. Start the application (in development mode)

npm run dev

4. Build the application, package the installer for current platform

npm run package

5. Build the application, package the installer for all platforms

npm run package:all