refactor: replace doom-enlist with ensure-list

doom-enlist is now a deprecated alias for ensure-list, which is built
into Emacs 28.1+ and is its drop-in replacement. We've already
backported it for 27.x users in doom-lib (in 4bf4978).

Ref: 4bf49785fd

lisp/lib/buffers.el

@@ -160,7 +160,7 @@ See `doom-real-buffer-p' for details on what that means."
   "Return a list of buffers whose `major-mode' is `eq' to MODE(S).
 
 If DERIVED-P, test with `derived-mode-p', otherwise use `eq'."
-  (let ((modes (doom-enlist modes)))
+  (let ((modes (ensure-list modes)))
     (cl-remove-if-not (if derived-p
                           (lambda (buf)
                             (apply #'provided-mode-derived-p

lisp/lib/files.el

@@ -101,7 +101,7 @@ The search recurses up to DEPTH and no further. DEPTH is an integer.
 
 MATCH is a string regexp. Only entries that match it will be included."
   (let (result)
-    (dolist (file (mapcan (doom-rpartial #'doom-glob "*") (doom-enlist paths)))
+    (dolist (file (mapcan (doom-rpartial #'doom-glob "*") (ensure-list paths)))
       (cond ((file-directory-p file)
              (appendq!
               result

lisp/lib/help.el

@@ -111,7 +111,7 @@ selection of all minor-modes, active or not."
   "TODO"
   (require 'org)
   (let* ((default-directory doom-docs-dir)
-         (org-agenda-files (mapcar #'expand-file-name (doom-enlist files)))
+         (org-agenda-files (mapcar #'expand-file-name (ensure-list files)))
          (depth (if (integerp depth) depth))
          (mindepth (if (integerp mindepth) mindepth))
          (org-inhibit-startup t))

lisp/lib/text.el

@@ -316,7 +316,7 @@ editorconfig or dtrt-indent installed."
            (editorconfig-set-indentation nil width)))
         ((require 'dtrt-indent nil t)
          (when-let (vars (nth 2 (assq major-mode dtrt-indent-hook-mapping-list)))
-           (dolist (var (doom-enlist vars))
+           (dolist (var (ensure-list vars))
              (doom-log "Updated %s = %d" var width)
              (set var width)))))
   (message "Changed indentation to %d" width))

lisp/lib/themes.el

@@ -28,7 +28,7 @@ all themes. It will apply to all themes once they are loaded."
     `(progn
        (defun ,fn ()
          (let (custom--inhibit-theme-enable)
-           (dolist (theme (doom-enlist (or ,theme 'user)))
+           (dolist (theme (ensure-list (or ,theme 'user)))
              (when (or (eq theme 'user)
                        (custom-theme-enabled-p theme))
                (apply #'custom-theme-set-faces theme