feat(emacs): org mode basic qol improvements

* CJK zero-width space
* Fonts for CJK characters
* Paste images from clipboard (org-download)
* Line-feed by default
* Visual relative line mode number (instead of physical relative)
* Treemacs: Sidebar file tree in Emacs

tools/emacs.d/lisp/init-file.el

@@ -1,4 +1,4 @@
-;;; init-file.el -- File Management configuration 
+;;; init-file.el -- File Management configuration
 ;;; First edit at 2025/01/29
 
 ;; Dired
@@ -20,5 +20,38 @@
 ;; https://stackoverflow.com/q/1839313
 (setq dired-kill-when-opening-new-dired-buffer t)
 
+;; Treemacs - Sidebar File Tree
+(use-package treemacs
+    :ensure t
+    :defer t
+    :init
+    (with-eval-after-load 'winum
+        (define-key winum-keymap (kbd "M-0") #'treemacs-select-window))
+    :bind
+    (:map global-map
+            ("M-0"       . treemacs-select-window)
+            ("C-x t 1"   . treemacs-delete-other-windows)
+            ("C-x t t"   . treemacs)
+            ("C-x t d"   . treemacs-select-directory)
+            ("C-x t B"   . treemacs-bookmark)
+            ("C-x t C-t" . treemacs-find-file)
+            ("C-x t M-t" . treemacs-find-tag)
+            )
+    )
+
+(use-package treemacs-evil
+  :after (treemacs evil)
+  :ensure t
+  :config
+  ;; Evil treemacs state bindings
+  (define-key evil-treemacs-state-map (kbd "n") #'treemacs-next-line)
+  (define-key evil-treemacs-state-map (kbd "e") #'treemacs-previous-line)
+  (define-key evil-treemacs-state-map (kbd "N") #'treemacs-next-neighbour)
+  (define-key evil-treemacs-state-map (kbd "E") #'treemacs-previous-neighbour)
+  (define-key evil-treemacs-state-map (kbd "H") #'treemacs-toggle-show-dotfiles)
+  (define-key evil-treemacs-state-map (kbd "I") #'treemacs-hide-gitignored-files-mode)
+  ;; Treemacs mode specific binding
+  (evil-define-key 'treemacs treemacs-mode-map (kbd "i") #'treemacs-RET-action))
+
 
 (provide 'init-file)