TAB Chars Wrong Size; Can't Fix

**Describe the bug**
Hard TAB chars in files or diffs appearing in the main panel are hard-coded to expand modulo-4, and there is no config option to fix this.

**Expected behavior**
The correct default for expanding hard TABs is modulo-8. Modulo-4 is certainly very popular, but is by no means universally accepted. When deviating from the common default, provision should be made for the user to change it.

Problem line is here. This value needs to be configurable: https://github.com/jesseduffield/lazygit/blob/8e6967c70273f838e4e200a61bdb631015d46bdc/vendor/github.com/jesseduffield/gocui/view.go#L738

**Version info:**
_Run `lazygit --version` and paste the result here_
commit=5149b24ab3dfad3860e2300519c7c583dcc8c9ff, build date=2023-05-03T08:00:22Z, build source=binaryRelease, version=0.38.2, os=linux, arch=amd64, git version=2.40.1

_Run `git --version` and paste the result here_
git version 2.40.1