Add bash completions for forgit functions and aliases

[carlfriedrich]

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

This is a follow-up to #235 and adds bash completion to the plugin functions and aliases.

Type of change

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

Test environment

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

[dagadbm]

Yes please :D

I was just about to suggest this because for sure it is really important to have

[dagadbm]

I forgot to ask if this will work for zsh or not

[carlfriedrich]

@dagadbm No, these are completions for bash only. I am not familiar with the zsh completion mechanism. Contributions for this are very welcome!