Warn when the user install the local cli globally

### Description

For some persons who don't know Vite+ from the official website, they may easily run `npm -g install vite-plus` to install Vite+, but it is actually not the expected global CLI. Node management and other core features are missing.

### Suggested solution

Print a warning when Vite+ local cli package is installed globally.

### Alternative

N / A

### Additional context

N / A

https://discord.com/channels/1475973262193459293/1524301479794446488/1524365671620804659

### Validations

- [x] Read the [Contributing Guidelines](https://github.com/voidzero-dev/vite-plus/blob/main/CONTRIBUTING.md).
- [x] Confirm this request is for Vite+ itself and not for Vite, Vitest, tsdown, Rolldown, or Oxc.
- [x] Check that there isn't already an issue requesting the same feature.

Start by locating the Vite+ local CLI package's installation path for `npm -g install vite-plus`, then check how that package can detect a global install. Done means the global installation prints a clear warning explaining that the expected global CLI is different, while normal local installation remains unaffected.

Scritto dal modello di indicizzazione a partire dal testo della issue.