Add viteplus as a package manager

[joknoll]

Describe the feature

Currently the get started widget shows a wide variety of installation methods for different package managers. With "vp add " it is possible to install a package in a viteplus project. https://viteplus.dev/guide/install

Additional information

• Would you be willing to help implement this feature?

Final checks

• Read the contribution guide.
• Check existing issues.

[ghostdevv]

We can also add it to the connector modal - I think we just have a generic place that package managers can be added to