✨ Dragging file on top of the "Welcome" window should open it

[richardtop]

Description

Similar to #1163

The feature should work as follows:

1. User opens the CodeEdit app
2. "welcome screen" is shown (take a look at the screenshot)
3. The user drags a file onto that welcome screen
4. The CodeEdit app opens with the file dragged.

Alternatives Considered

No response

Additional Context

No response

Screenshots