[Feature Request] Respect user's default shell preference instead of forcing bash

Bug Description
The terminal is annoying. I'm used to using fish. Also when I start a terminal from the inbuilt terminal, it still uses bash, even if starting terminals usually starts fish.

Environment Info

• Platform: linux
• Terminal: alacritty
• Version: 2.1.75
• Feedback ID: faa1cc3f-6db3-45ff-9a32-e4552e72656f

Errors

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