gt/gT = add goto Nth tab behavior

As it does in vim.

modules/editor/evil/config.el

@@ -447,8 +447,8 @@ directives. By default, this only recognizes C directives.")
        :n "]w"   #'+workspace/switch-right
        :n "[w"   #'+workspace/switch-left)
       (:when (featurep! :ui tabs)
-       :n "gt"   #'centaur-tabs-forward
-       :n "gT"   #'centaur-tabs-backward)
+       :n "gt"   #'+tabs:next-or-goto
+       :n "gT"   #'+tabs:previous-or-got)
 
       ;; custom vim-unmpaired-esque keys
       :m  "]#"    #'+evil/next-preproc-directive

modules/ui/tabs/autoload.el

@@ -0,0 +1,18 @@
+;;; ui/tabs/autoload.el -*- lexical-binding: t; -*-
+;;;###if (featurep! :editor evil)
+
+;;;###autoload (autoload '+tabs:next-or-goto "ui/tabs/autoload" nil t)
+(evil-define-command +tabs:next-or-goto (index)
+  "Switch to the next tab, or to INDEXth tab if a count is given."
+  (interactive "<C>")
+  (if current-prefix-arg
+      (centaur-tabs-select-visible-nth-tab current-prefix-arg)
+    (centaur-tabs-forward)))
+
+;;;###autoload (autoload '+tabs:previous-or-goto "ui/tabs/autoload" nil t)
+(evil-define-command +tabs:previous-or-goto (index)
+  "Switch to the previous tab, or to INDEXth tab if a count is given."
+  (interactive "<C>")
+  (if current-prefix-arg
+      (centaur-tabs-select-visible-nth-tab current-prefix-arg)
+    (centaur-tabs-backward)))