Fix: gsp does not work outside the root directory

[sandr01d]

Check list

• I have performed a self-review of my code
• I have commented my code in hard-to-understand areas
• I have made corresponding changes to the documentation

Description

gsp only works when executing it from the repository's root directory. This commit fixes this by passing the root directory to the git ls-files command we use to determine the files that can be stashed, similarly to how we do it in _forgit_reset_head.

Type of change

• Bug fix
• New feature
• Refactor
• Breaking change
• Documentation change

Test environment

• Shell
  • bash
  • zsh
  • fish
• OS
  • Linux
  • Mac OS X
  • Windows
  • Others:

[wfxr]

Thank you @sandr01d, There is a similar issue I found. Could you help fix this too?

[sandr01d]

Thank you @sandr01d, There is a similar issue I found. Could you help fix this too?

Sure, I'll take a look