[Feat]: Git terminal integration

[mgite]

Git completion support is already there in the image it just needs to be activated by source /usr/share/bash-completion/completions/git in ~/.bashrc. Currently git does not show any parameters when using TAB. After sourcing this file it works.

Either include it in the images default .bashrc or give us some way to do it using environment variables to set things up. One can mount .bash_aliases file which is already sourced in .bashrc but some of us just do not want to mount those kind of files which you will have to edit manually after starting container.