Push sugestion when there's no local changes

### Description

I think that will be good if it be showed prompt to make push on a project when there's no local changes a it and there are differences between local anda remote repositories.

Maybe it will help to keeping remote repositories updated avoiding situations like traveling and forgetting to upload changes to the remote repository to continue working on them elsewhere

### Use case/motivation

It should apper a symbol that signals that there are outgoing commit on the project as there's a symbol for singnals local changes

Maybe some other more flashy way will be good, at the show changes tab when the whole project is selected or at the notifications tab whit the push action on it

### Related issues

_No response_

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

No

### Code of Conduct

Yes

Start by tracing how NetBeans detects Git local changes and exposes status in the project UI. Review the show changes and notifications areas mentioned in the issue, then determine where outgoing commits could be surfaced. Done means a project with no local changes but unpushed commits visibly signals that a push is available.

Written by the indexing model from the issue text.