Based on https://github.com/alacritty/alacritty/issues/7795

Unknown error code commands (now includes the interrupted ones):

![image](https://github.com/zed-industries/zed/assets/2690773/801868bc-081c-453c-a353-233d4397bda9)

Successful command:

![image](https://github.com/zed-industries/zed/assets/2690773/874377c7-c967-4a6f-8a89-ec7bf398a8b3)

Unsuccessful command:

![image](https://github.com/zed-industries/zed/assets/2690773/6c99dc5d-d324-41e9-a71b-5d0bf705de27)

The "design", including wordings and special characters, is not final,
suggestions are welcome.
The main idea was to somehow distinguish the appended lines without
occupying extra vertical space.

Release Notes:

- Added task summary output into corresponding terminal tabs