treewide: move defaults to dedicated folder

cli/git.nix

@@ -1,47 +0,0 @@
-{
-  pkgs,
-  lib,
-  config,
-  ...
-}:
-
-let
-  name = "git";
-  cfg = config.nixowos.cli.${name};
-in
-{
-  options.nixowos.cli.${name} = {
-    enable = lib.mkEnableOption name;
-
-    delta.enable = lib.mkEnableOption "delta within git" // {
-      default = true;
-    };
-  };
-
-  config = lib.mkIf cfg.enable {
-
-    programs.git = {
-      enable = true;
-
-      config = lib.mkMerge [
-        {
-          init.defaultBranch = "main";
-          core.compression = 9; # max
-          credential.helper = "cache";
-
-          push.autoSetupRemote = true;
-          pull.ff = "only";
-          merge.conflictStyle = "zdiff3";
-          commit.verbose = true; # show diffs in commit editor
-        }
-        (lib.mkIf cfg.delta.enable {
-          core.pager = "${pkgs.delta}/bin/delta";
-          interactive.diffFilter = "${pkgs.delta}/bin/delta --color-only";
-          delta.navigate = true; # use n and N to move between diff sections
-          delta.diff-highlight = true; # simpler mode, highlights inter-line changes
-        })
-      ];
-    };
-
-  };
-}