Add gitconfig in xdg location

Recommendations came from this blog post:
    https://blog.gitbutler.com/how-git-core-devs-configure-git/

Let's see how this works out lol

Test

apply-dotfiles

@@ -17,6 +17,8 @@ apply_dotfile sh
 apply_dotfile readline
 apply_dotfile screen
 
+apply_dotfile git
+
 apply_dotfile vim
 
 apply_dotfile ruby

git/.config/git/config

@@ -0,0 +1,25 @@
+[branch]
+	sort = -committerdate
+[column]
+	ui = auto
+[tag]
+	sort = version:refname
+[init]
+	defaultBranch = main
+[diff]
+	algorithm = histogram
+	colorMoved = plain
+	mnemonicPrefix = true
+	renames = true
+[push]
+	default = simple
+	autoSetupRemote = true
+	followTags = true
+[fetch]
+	prune = true
+	pruneTags = true
+	all = true
+[commit]
+	verbose = true
+[core]
+	excludefiles = ~/.config/git/ignore