tweak(guard-lf): add a dedicated mode for guard-lf files

Author: abougouffa

modules/me-files.el

@@ -47,8 +47,11 @@
 
 (use-package guard-lf
   :straight (:host github :repo "jcs-elpa/guard-lf")
+  :custom
+  (guard-lf-major-mode #'guard-lf-large-file-mode)
   :init
   (guard-lf-mode 1)
+  (define-derived-mode guard-lf-large-file-mode fundamental-mode "guard-lf")
   :config
   (cl-callf append guard-lf-intact-major-modes '(rosbag-info-mode)))