Hability to create folders/groups

### Checks

- [x] I have searched the [existing issues](https://github.com/adembc/lazyssh/issues).

### Motivation

It would be a nice additions if it were possible to group servers, ideally through a collapsible list of some sort.

### Implementation

_No response_

### Are you willing & able to help?

- [x] I am able to submit a PR!
- [x] I can help test the feature!