emacs: Add breadcrumb mode by Joao Tavora

hosts/bebop/pihole.nix

@@ -1,5 +1,4 @@
-{ config, pkgs, lib, ... }:
-
+{ ... }:
 let
   serverIP = "0.0.0.0";
 in

hosts/hermes/doom/config.org

@@ -157,6 +157,9 @@ Tangle ~packages.el~ from within org-mode.
 (package! jinx :type 'built-in :built-in 'prefer)
 
 (package! engrave-faces)
+
+(package! breadcrumb
+  :recipe (:type git :host github :repo "joaotavora/breadcrumb"))
 #+end_src
 * Modus-themes
 Customize Modus-themes a little to make it more peppy and vibrant.
@@ -810,6 +813,14 @@ Gnus:
   :after (eglot)
   :init
   (add-hook! (java-mode java-ts-mode) #'eglot-java-mode))
+
+(use-package breadcrumb
+  :commands (breadcrumb-mode)
+  :after (emacs)
+  :init
+  (setq breadcrumb-project-crumb-separator " → "
+        breadcrumb-imenu-crumb-separator " → ")
+  (breadcrumb-mode 1))
 #+end_src
 
 * Bunch of small stuff