feat(config): Improve dired, keybindings, terminal UI and add packages

- Add dired buffer killing and custom dirvish layout toggle
- Replace ido with fido-mode in terminal config
- Add custom terminal color theme with 24-bit color support
- Add new packages: tokei, helpful, gptel-magit
- Refactor project keybindings under C-x p prefix
- Add mwim navigation bindings globally
- Improve ibuffer filter groups and consult buffer filters
- Add diff-mode keybindings and refine magit diff display

lisp/my-base16-light-theme.el

@@ -83,7 +83,8 @@
      `(transient-key-noop ((,class (:foreground ,base01 :inherit transient-key))))
      `(keycast-key ((,class (:foreground ,green :weight bold))))
      `(emms-playlist-track-face ((,class (:foreground ,cyan))))
-     `(emms-playlist-selected-face ((,class (:foreground ,blue :weight bold)))))))
+     `(emms-playlist-selected-face ((,class (:foreground ,blue :weight bold))))
+     `(diff-hunk-header ((,class (:foreground "#6b561e" :background "#f0e6b8")))))))
 
 (provide-theme 'my-base16-light)