Multiple NetBeans instances at the same time

### Description

Hello NetBeans team,

first of all, thanks for all the effort you put into building this IDE.
I would like to ask for a feature that many modern IDEs have, multiple istances.
I think this feature is a must have nowadays, and could improve, at least in my use case, the productivity while coding

### Use case/motivation

At work i use to develop on different projects, and i don't like to have unrelated projects opened all together, and switching project groups is not a viable solution because it is too slow for big projects.
Because of this i would like to have a feature like this.
The screenshot attached is taken from the context menu of VSCode, as a further explanation of the kind of feature requested

### Related issues

_No response_

### Are you willing to submit a pull request?

No

### Code of Conduct

Yes

No files, tests, or entry points are named in the issue. Start by locating NetBeans' instance and project-opening lifecycle, then define and verify support for running separate instances with unrelated projects without slowing project-group switching.

Written by the indexing model from the issue text.