bug: killing kit s with ^C does not stop package from uploading to node

[0x70b1a5]

Describe the bug
After cancelling a Start command, the package continues to upload until it is done. It doesn't appear to actually start the process, though.

To Reproduce
Steps to reproduce the behavior:

1. Get on a slow connection.
2. Open a bandwidth monitor, eg nethogs.
3. kit s to a remote node.
4. Kill with ^C.
5. Watch upload speed for ssh remain high until upload finishes.

Expected behavior
Upload should be aborted.

Desktop (please complete the following information):

• OS: Ubuntu 24.04.1 LTS x86_64
• Kernel: 6.8.0-48-generic
• kit version: 0.8.0

[nick1udwig]

Thanks for the issue, will look into it