Add and configure mu4e to read/send emails from emacs.

The mu4e package was installed through debian apt, I
have to find a way to manage it with straight.el

elisp/settings.el

@@ -7,6 +7,9 @@
 ;; Set default encoding
 (setq current-language-environment "UTF-8")
 
+;; Handle pinentry in minibuffer if called from emacs
+(setq epg-pinentry-mode "loopback")
+
 ;; Always do syntax highlighting
 (global-font-lock-mode 1)