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

home.nix

@@ -38,6 +38,9 @@
     github-copilot-cli
     nerd-fonts.iosevka-term
     fzf
+    fd
+    bat
+    delta
     # # It is sometimes useful to fine-tune packages, for example, by applying
     # # overrides. You can do that directly here, just don't forget the
     # # parentheses. Maybe you want to install Nerd Fonts with a limited number of
@@ -92,9 +95,41 @@
   programs.home-manager.enable = true;
   programs.fish = {
     enable = true;
+    shellInit = ''
+      set fzf_diff_highlighter delta --paging=never --width=20
+    '';
     shellInitLast = ''
       zoxide init fish | source
     '';
+    plugins = [
+      {
+        name = "tide";
+        src = pkgs.fetchFromGitHub {
+          owner = "plttn";
+          repo = "tide";
+          rev = "v7";
+          hash = "sha256-R2oIGbDPF81NurJ5R2Jos6P5mxYTyb1n1cpI1AZ35H4=";
+        };
+      }
+      {
+        name = "fish-git-abbr";
+        src = pkgs.fetchFromGitHub {
+          owner = "lewisacidic";
+          repo = "fish-git-abbr";
+          rev = "dc590a5b9d9d2095f95f7d90608b48e55bea0b0e";
+          hash = "sha256-6z3Wr2t8CP85xVEp6UCYaM2KC9PX4MDyx19f/wjHkb0=";
+        };
+      }
+      {
+        name = "fzf-fish";
+        src = pkgs.fetchFromGitHub {
+          owner = "PatrickF1";
+          repo = "fzf.fish";
+          rev = "v11.0";
+          hash = "sha256-H7HgYT+okuVXo2SinrSs+hxAKCn4Q4su7oMbebKd/7s=";
+        };
+      }
+    ];
   };
 
   fonts.fontconfig.enable = true;