Mobile Broadband support

### Feature Description

Would love to see this feature in Dank, especially when I manage my mobile connections

### Use Case

if I quickly wanted to turn on a mobile connection.

### Compositor(s)

All compositors

### If Other, please specify

_No response_

### Proposed Solution

not sure if it is exposed by a network manager already

### Alternatives/Existing Solutions

_No response_

Start by examining the existing connection controls and determining whether NetworkManager exposes mobile broadband actions. Define the supported behavior for turning a mobile connection on across all listed compositors, then confirm the intended interaction and completion criteria with maintainers before implementation.

Written by the indexing model from the issue text.