Release Notes:

- Improved git error messages

Includes stderr in the error message for git commands, provides better
output for things like errors when switching branches.

Before:
<img width="702" height="330" alt="image"
src="https://github.com/user-attachments/assets/f32402ae-b85c-4b0b-aae8-789607e8ec9e"
/>

After:
<img width="650" height="575" alt="image"
src="https://github.com/user-attachments/assets/308dbe3c-1ff9-40b9-a187-1e12d2488c80"
/>

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Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>