refactor(emacs.d): Use dottime from my dottime package

Instead of locally advicing format-time-string, use my dottime
package.

tools/emacs/config/init.el

@@ -38,6 +38,7 @@
 
 (use-package dash)
 (use-package dash-functional)
+(use-package dottime :config (dottime-display-mode t))
 (use-package gruber-darker-theme)
 (use-package ht)
 (use-package hydra)

tools/emacs/config/look-and-feel.el

@@ -27,21 +27,6 @@
                               (font . ,font)))
   (set-frame-font font t t))
 
-;; Display modeline time in dottime (see https://dotti.me)
-;;
-;; This is done in a way that initially seems more complicated than
-;; one would like, but this is unfortunately required due to the way
-;; `format-time-string' handles timezones.
-(defun format-dottime-advice (orig _ &optional _ _)
-  (let* ((offset-sec (car (current-time-zone)))
-         (offset-hours (/ offset-sec 60 60))
-         (dottime (if (/= offset-hours 0)
-                      (concat "%M-%Dt%H·%M" (format "%0+3d" offset-hours))
-                    "%m-%dT%H·%M")))
-    (apply orig '("%m-%dT%H·%M" nil t))))
-
-(advice-add 'format-time-string :around #'format-dottime-advice)
-
 ;; Configure telephone-line
 (defun telephone-misc-if-last-window ()
   "Renders the mode-line-misc-info string for display in the

tools/emacs/default.nix

@@ -8,6 +8,7 @@ with third_party.emacsPackagesNg;
 with third_party.emacs;
 
 let
+  localPackages = pkgs.tools.emacs-pkgs;
   emacsWithPackages = (third_party.emacsPackagesNgGen third_party.emacs26).emacsWithPackages;
 
   tazjinsEmacs = (emacsWithPackages(epkgs:
@@ -81,7 +82,7 @@ let
   ]) ++
 
   # Custom packages
-  [ carp-mode ]
+  [ carp-mode localPackages.dottime ]
   ));
 in third_party.writeShellScriptBin "tazjins-emacs" ''
   exec ${tazjinsEmacs}/bin/emacs \
@@ -90,5 +91,5 @@ in third_party.writeShellScriptBin "tazjins-emacs" ''
     --no-site-lisp \
     --no-init-file \
     --directory ${./config} \
-    --eval "(require 'init)"
+    --eval "(require 'init)" $@
 ''