feat: upgrade to version 2.0.0-alpha with mainstream dependencies

- Update application version to 2.0.0-alpha
- Update application name to 'Ambient Light Control'
- Upgrade Node.js requirement to >=22.0.0 (current LTS)
- Upgrade pnpm requirement to >=10.0.0 (current stable)
- Update all GitHub Actions workflows to use Node.js 22 and pnpm 10
- Update README.md with current version requirements
- Add comprehensive project metadata to package.json
- Remove obsolete src-tauri/src-tauri directory structure
- Update Cargo.toml with proper project information

README.md

@@ -56,12 +56,13 @@ A desktop application built with Tauri 2.0 for ambient light control, supporting
 2. **Install Node.js and pnpm**
 
    ```bash
-   # Install Node.js (recommended using nvm)
+   # Install Node.js 22 LTS (recommended using nvm)
    curl -o- https://raw.githubusercontent.com/nvm-sh/nvm/v0.39.0/install.sh | bash
-   nvm install node
+   nvm install 22
+   nvm use 22
 
-   # Install pnpm
-   npm install -g pnpm
+   # Install pnpm 10+
+   npm install -g pnpm@latest
    ```
 
 3. **Install Tauri CLI**