Add button to open advenced network configuration from the settings

### Feature Description

A button to open a network configuration in a tool like `nm-connection-editor`.

### Use Case

I often want to edit advanced settings for networks like DNS, but have to resort to using the CLI or a 3rd party tool because DMS doesn't provide a GUI option for it.

### Compositor(s)

All compositors

### If Other, please specify

_No response_

### Proposed Solution

I suggest adding a little gear button next to the delete button in the network listing in the settings or a "Configure Network" option under the ··· menu in the quick settings. This would open `nm-connection-editor --edit (Network UUID)`.

If `nm-connection-editor` is not installed, it could either not show up, or show a pop-up message telling you it's missing. There could be other network manager tools supported, this is just the one i know of.

### Alternatives/Existing Solutions

You can just run `nm-connection-editor` from the terminal, but that's the issue.

Start by locating the settings network listing and the quick-settings overflow menu described in the issue, then check how network UUIDs are exposed. Verify how to invoke `nm-connection-editor --edit (Network UUID)` and how the missing-tool case should behave; done means an available entry opens the selected network's advanced configuration and an unavailable tool is handled visibly.

Written by the indexing model from the issue text.