Launcher: expose `Terminal=true` apps' class and title

### Feature Description

Currently TUI apps launched from shell inherits the terminal used.

When opening btop++ by clicking it in launcher/dock.

### Use Case

Easier to distinguish, enabling windowrules matching, enabling icon mapping.

### Compositor(s)

All compositors

### If Other, please specify

_No response_

### Proposed Solution

modify the wrapper to include flags for supported terminals.
e.g. **-e** for Alacritty

### Alternatives/Existing Solutions

Not a solution but to workaround is to define per-user desktop application file. defeats the impl of DMS launcher's terminal + start exec command selector.

Start at the launcher/dock entry point that handles applications with Terminal=true and trace the wrapper used to select supported terminals. Verify the change by launching btop++ from the launcher and checking that its window class and title are distinguishable for window rules and icon mapping.

Written by the indexing model from the issue text.