Experimentally replace default ivy completion with vertico

This may change back in the future.

The ivy configuration is kept on purpose, in particular because some
counsel functions are still in use.  Maybe those can be also be replaced
later on, maybe with helm functions?  Not quite sure whether this is a
good idea, though.

init.el

@@ -2090,7 +2090,9 @@ Note that this workaround is incomplete, as explained in this comment."
 (setq suggest-key-bindings t
       extended-command-suggest-shorter t
       completions-detailed t
-      completion-cycle-threshold 10)
+      completion-cycle-threshold 10
+      completion-styles '(basic substring initials partial-completion orderless)
+      completion-category-defaults nil)
 
 (use-package helm
   :ensure t
@@ -2142,9 +2144,7 @@ Note that this workaround is incomplete, as explained in this comment."
   :commands (helm-show-kill-ring))
 
 (use-package ivy
-  :ensure t
-  :commands (ivy-mode
-             ivy-resume)
+  :commands (ivy-mode)
   :diminish ivy-mode
   :init (setq ivy-use-virtual-buffers t
               ivy-magic-tilde nil
@@ -2169,12 +2169,7 @@ Note that this workaround is incomplete, as explained in this comment."
   :ensure t
   :commands (counsel-org-goto-all
              counsel-info-lookup-symbol
-             counsel-unicode-char
-             counsel-recentf
-             counsel-shell-history))
-
-(use-package smex
-  :init (setq smex-save-file (expand-file-name "smex-items" emacs-d-userdata)))
+             counsel-unicode-char))
 
 (use-package swiper
   :ensure t
@@ -2191,6 +2186,17 @@ Note that this workaround is incomplete, as explained in this comment."
   :commands (company-mode global-company-mode)
   :init (setq company-show-quick-access t))
 
+(use-package marginalia
+  :ensure t
+  :commands (marginalia-mode))
+
+(use-package vertico
+  :ensure t
+  :commands (vertico-mode))
+
+(use-package orderless
+  :ensure t)
+
 
 ;; * Navigation
 
@@ -2486,8 +2492,6 @@ eventuelly be set to nil, however)."
 
 (use-package shell
   :commands (shell)
-  :bind (:map shell-mode-map
-              ("C-r" . counsel-shell-history))
   :config (progn
             (add-hook 'shell-mode-hook 'ansi-color-for-comint-mode-on)
             (add-hook 'comint-output-filter-functions 'comint-strip-ctrl-m)
@@ -2935,13 +2939,15 @@ eventuelly be set to nil, however)."
                   minibuffer-depth-indicate-mode
                   ace-window-display-mode
                   key-chord-mode
-                  ivy-mode
+                  ;; ivy-mode
                   minions-mode
                   which-key-mode
                   projectile-mode
                   yas-global-mode
                   global-git-commit-mode
                   ;; global-company-mode
+                  marginalia-mode
+                  vertico-mode
                   ))
     (with-demoted-errors "Cannot activate mode: %s"
       (funcall mode +1)))
@@ -2996,7 +3002,6 @@ eventuelly be set to nil, however)."
   (bind-key "C-S-c C-S-c" #'mc/edit-lines)
   (bind-key "C-Z" #'undo-tree-redo)
   (bind-key "C-c C-<" #'mc/mark-all-like-this)
-  (bind-key "C-c C-r" #'ivy-resume)
   (bind-key "C-c D" #'define-word)
   (bind-key "C-c J" #'avy-goto-word-or-subword-1)
   (bind-key "C-c a" #'org-agenda)