Automatically detect kusion binary version outdated status and install latest

## Feature Request

**Describe the feature you'd like:**

- user could configure if the extension should check the kusion binary updates.- the extension checks for kusion updates, and

```
"vscode-kusion": {
"vscode-kusion.auto-update-detection": "Everyday during idle time"
}
```

- prompt updates when newer kusion binary releases exist.


- user could select to update to a specific kusion version or directly update to the latest version.


- user could also manually trigger the update detection by typing command in command palette: `Kusion: check for updates`

No files or tests are named. Start by locating the VS Code command entry point for `Kusion: check for updates` and the extension's kusion binary version and installation handling. Define the settings, release lookup, prompts, version selection, automatic checks, and manual command behavior; done means users can detect and install a selected or latest update.

Written by the indexing model from the issue text.