Added core.filemode=false so doesn't track changes in file permission…

[RedDeltas]

…s in more restrictive environments

Description

• In more restrictive environments such as a mounted GDrive the drive can change permissions on some cloned files.
• At the moment, once a repo is cloned and if file permissions get updated it registers it as a change in git and then future updates can't be applied as it requests for your changes to be stashed or committed first
• This can be quite confusing for people who aren't familiar with git and haven't changed anything themselves

Checklist:

• I have read contributing wiki page
• I have performed a self-review of my own code
• My code follows the style guidelines
• My code passes tests

^^ I struggled with the tests as my dev environment doesn't have an GPU, I've used Forge with this change in on CoLab and it works well - it would be greatly appreciated if someone could run the tests on their environment - I expect them to pass as this is a very small change that won't have an impact in most environments

[RedDeltas]

Is there anything else you need from me for this?