[nix] Use delta as a git pager (ht to @moonglum)

dot_config/nixpkgs/home.nix

@@ -63,6 +63,7 @@ in
       unstable.pkgs.darktable
       unstable.pkgs.foot
       unstable.pkgs.qutebrowser
+      pkgs.delta
       pkgs.any-nix-shell
       pkgs.socat
       pkgs.age
@@ -419,6 +420,7 @@ in
 
   services.mbsync.enable = true;
   services.gnome-keyring.enable = true;
+
   services.nextcloud-client.enable = true;
   services.emacs.enable = true;
   programs.emacs = {

dot_gitconfig.tmpl

@@ -7,10 +7,24 @@
 	excludesfile = ~/.gitignore
 	editor = em -nw
 	hooksPath = ~/.config/git/hooks
+	pager = delta
 
 [commit]
 	gpgsign = true
 
+[interactive]
+	diffFilter = delta --color-only
+
+[delta]
+	navigate = true
+	light = false
+
+[merge]
+	conflictstyle = diff3
+
+[diff]
+	colorMoved = default
+
 [alias]
 	lol= 'log' '--oneline' '--graph' '--decorate'
 	lg1 = log --graph --all --format=format:'%C(bold blue)%h%C(reset) - %C(bold green)(%ar)%C(reset) %C(white)%s%C(reset) %C(bold white)— %an%C(reset)%C(bold yellow)%d%C(reset)' --abbrev-commit --date=relative