feat(base): Add magit-prime, org-tree-slide, pixel-scroll and eww config

- Install magit-prime package
- Add org-tree-slide with custom start/stop functions and keybindings
- Enable pixel-scroll-precision-mode
- Add basic eww configuration

lisp/init-ui.el

@@ -45,7 +45,11 @@
   :delight
   :hook
   (org-mode . olivetti-mode)
-  (olivetti-mode . (lambda () (display-line-numbers-mode -1))))
+  (olivetti-mode . (lambda () (display-line-numbers-mode -1)))
+  :custom
+  (olivetti-body-width 80)
+  :config
+  (setq olivetti-body-width 80))
 
 ;; rainbow mode
 (use-package rainbow-mode)