Add module for dired-sidebar mode

Not used at the moment, but I'll keep this around and check it out every
now and then.

modules/projects/siren-dired-sidebar.el

@@ -0,0 +1,31 @@
+;;; siren-dired-sidebar.el --- jimeh's Emacs Siren: dired-sidebar configuration.
+
+;;; Commentary:
+
+;; Basic configuration for dired-sidebar.
+
+;;; Code:
+
+(use-package dired-sidebar
+  :commands dired-sidebar-toggle-sidebar
+
+  :bind
+  ("C-x C-p" . dired-sidebar-toggle-sidebar)
+
+  :config
+  (setq dired-sidebar-subtree-line-prefix " .")
+  (cond
+   ((eq system-type 'darwin)
+    (if (display-graphic-p)
+        (setq dired-sidebar-theme 'icons)
+      (setq dired-sidebar-theme 'nerd)))
+   (:default
+    (setq dired-sidebar-theme 'nerd)))
+  (setq dired-sidebar-use-term-integration t))
+
+(use-package all-the-icons-dired
+  :requires dired-sidebar
+  :commands (all-the-icons-dired-mode))
+
+(provide 'siren-dired-sidebar)
+;;; siren-dired-sidebar.el ends here