bitwarden: add header lines for better navigation

bitwarden.el

@@ -32,6 +32,8 @@
 
 (require 'json)
 
+;=============================== custom variables ==============================
+
 (defcustom bitwarden-bw-executable (executable-find "bw")
   "The bw cli executable used by Bitwarden."
   :group 'bitwarden
@@ -61,6 +63,8 @@ example, this can be the :secret plist from
 (defconst bitwarden--err-multiple  "more than one result found")
 (defconst bitwarden--err-locked    "vault is locked")
 
+;===================================== util ====================================
+
 (defun bitwarden-logged-in-p ()
   "Check if `bitwarden-user' is logged in.
 Returns nil if not logged in."
@@ -162,6 +166,8 @@ the command and whether to pass the user."
                   (concat bitwarden-bw-executable " " cmd))))
     (set-process-filter process #'bitwarden--login-proc-filter)))
 
+;================================= interactive =================================
+
 (defun bitwarden-unlock ()
   "Unlock bitwarden vault.
 It is not sufficient to check the env variable for BW_SESSION