new .gitconfig with ssh signing key

.gitconfig

[user]
	email = 22800416+occamist@users.noreply.github.com
	name = Talha Altinel
	signingkey = ~/.ssh/github.pub
[url "ssh://git@github.com/"]
	insteadOf = https://github.com/
	insteadOf = http://github.com/
[url "ssh://git@gitlab.com/"]
	insteadOf = https://gitlab.com/
	insteadOf = http://gitlab.com/
[filter "lfs"]
	required = true
	clean = git-lfs clean -- %f
	smudge = git-lfs smudge -- %f
	process = git-lfs filter-process
[core]
	editor = vim
[pull]
	ff = only
[push]
	autoSetupRemote = true
[init]
	defaultBranch = main
[gpg]
  format = ssh
[gpg "ssh"]
  allowedSignersFile = ~/.ssh/allowed_signers
[commit]
	gpgsign = true
[tag]
	gpgSign = true