Feature: Added interactive git blame

[sandr01d]

Check list

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

Description

Works similar to the existing gd. Flags are passed on to the blame command, so you could do something like gb --color-lines.

https://user-images.githubusercontent.com/88739791/172466763-1513a006-93de-429a-a6af-c8d2f3b9c9cf.mov

Type of change

• [ ] Bug fix
• [X] New feature
• [ ] Refactor
• [ ] Breaking change
• [X] Documentation change

Test environment

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

[cjappl]

@sandr01d would you attach a screenshot or screenshots of how the feature looks to this PR? I'll assign @wfxr to take a look when he has a second.

[wfxr]

Mostly LGTM. I requested a minor change.

[sandr01d]

Good point, I've updated accordingly

[wfxr]

@sandr01d Thanks for your contribution!