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-package.el

@@ -24,6 +24,13 @@
   (require 'use-package))
 (setq use-package-always-ensure t)
 
+;; use-package offers many syntax sugar.
+;; :bind -> bindkeys
+;; :config -> `(progn do sth)
+;; :init -> (progn do sth)
+;; :after -> (when (featurep 'package)do sth)
+;; :hook -> (add-hook 'some-hook #'some-mode)
+
 ;; This part initialse the GPG Keyring
 ; Disable signature first
 (setq package-check-signature nil)
@@ -44,13 +51,21 @@
 
 ;; Dashboard
 (use-package dashboard
-  ; Open with :dashboard-open<CR>
+  ;; Open with :dashboard-open<CR>
   :after evil
+  :bind (:map dashboard-mode-map
+         ;; Navigation
+         ("n" . dashboard-next-line)
+         ("e" . dashboard-previous-line)
+         ;; Buffer switching
+         ("H" . previous-buffer)
+         ("I" . next-buffer))
   :config
   (dashboard-setup-startup-hook)
-  ; Use Emacs mode to use number to navigate dashboard
-  (evil-set-initial-state 'dashboard-mode 'emacs)
+  (setq dashboard-center-content t)
+  ;; Use Emacs mode to use number to navigate dashboard
   )
+
 ;(use-package dashboard
 ;  :ensure t
 ;  :init
@@ -58,7 +73,6 @@
 ;  :config
 ;  (setq dashboard-banner-logo-title "EMACS")
 ;  (setq dashboard-startup-banner 'official)
-;  (setq dashboard-center-content t)
 ;  (setq dashboard-items '((recents . 5)
 ;			  (bookmark . 5))))
 ;