Add dired evil search next/previous key bindings

The search next/previous commands are different
because of the `evil-search-module' values:
vim    = evil-search
hybrid = isearch

- With the =vim= editing style in =normal= state:
  - ~n~ =evil-ex-search-next=
  - ~N~ =evil-ex-search-previous=
- With the =hybrid= editing style in =normal= state:
  - ~n~ =evil-search-next=
  - ~N~ =evil-search-previous=

CHANGELOG.develop

@@ -859,6 +859,13 @@ Other:
     - ~down~ =evil-next-visual-line=
   - Added ~a~ for =ace-window= to window manipulation transient state
     (thanks to fleimgruber)
+  - Added =dired= evil search next/prev key bindings (thanks to duianto):
+    - With the =vim= editing style in =normal= state:
+      - ~n~ =evil-ex-search-next=
+      - ~N~ =evil-ex-search-previous=
+    - With the =hybrid= editing style in =normal= state:
+      - ~n~ =evil-search-next=
+      - ~N~ =evil-search-previous=
 - Improvements:
   - Rewrote window layout functions for ~SPC w 1~, ~SPC w 2~, ~SPC w 3~, and
     ~SPC w 4~ (thanks to Codruț Constantin Gușoi):

layers/+spacemacs/spacemacs-defaults/packages.el

@@ -75,7 +75,16 @@
     "ad" 'spacemacs/dired
     "fj" 'dired-jump
     "jd" 'dired-jump
-    "jD" 'dired-jump-other-window))
+    "jD" 'dired-jump-other-window)
+  ;; The search next/previous commands are different
+  ;; because of the `evil-search-module' values:
+  ;; vim = evil-search, hybrid = isearch
+  (when (eq 'vim dotspacemacs-editing-style)
+    (evil-define-key 'normal dired-mode-map (kbd "n") 'evil-ex-search-next)
+    (evil-define-key 'normal dired-mode-map (kbd "N") 'evil-ex-search-previous))
+  (when (eq 'hybrid dotspacemacs-editing-style)
+    (evil-define-key 'normal dired-mode-map (kbd "n") 'evil-search-next)
+    (evil-define-key 'normal dired-mode-map (kbd "N") 'evil-search-previous)))
 
 (defun spacemacs-defaults/init-dired-x ()
   (use-package dired-x