feature: git: Using delta as difftool

This also enables highlighting in the fzf-fish for git-related searches

dotfiles/.gitconfig

@@ -5,25 +5,22 @@
 [push]
 	default = current
 
-[diff]
-  external = difft
-	tool = difftastic
-
-[difftool]
-	prompt = false
-
-[difftool "difftastic"]
-	cmd = difft "$LOCAL" "$REMOTE"
-
-[pager]
-	difftool = true
-
 [credential]
 	helper = cache --timeout=600
 
 [core]
 	editor = nvim
 	autocrlf = input
+  pager = delta
 
 [init]
 	defaultBranch = main
+
+[interactive]
+    diffFilter = delta --color-only
+
+[delta]
+    navigate = true  # use n and N to move between diff sections
+
+[merge]
+    conflictStyle = zdiff3