Ajouter fuzzel, khal ; mettre à jour README

fuzzel utilisé en mode --dmenu dans le script screenshot.
README réécrit : table des packages, commandes d'installation,
dépendances Hyprland et mail.

Co-Authored-By: Claude Sonnet 4.6 <noreply@anthropic.com>

khal/.config/khal/config

@@ -0,0 +1,51 @@
+[calendars]
+
+[[perso]]
+path = ~/.calendars/perso/
+color = light cyan
+
+[[famille]]
+path = ~/.calendars/famille/
+color = light green
+
+[[personal_shared_by_margot]]
+path = ~/.calendars/personal_shared_by_margot/
+color = light magenta
+
+[[contact_birthdays]]
+path = ~/.calendars/contact_birthdays/
+color = light red
+
+[sqlite]
+path = ~/.local/share/khal/khal.db
+
+[locale]
+local_timezone = Europe/Paris
+default_timezone = Europe/Paris
+timeformat = %H:%M
+dateformat = %d/%m/%Y
+datetimeformat = %d/%m/%Y %H:%M
+longdateformat = %A %d %B %Y
+longdatetimeformat = %A %d %B %Y %H:%M
+weeknumbers = left
+firstweekday = 0
+
+[default]
+highlight_event_days = true
+
+[view]
+bold_for_light_color = true
+theme = dark
+frame = color
+event_view_always_visible = false
+
+[highlight_days]
+method = foreground
+default_color = light cyan
+multiple = light magenta
+
+[keybindings]
+new = a
+view = e, enter
+export = E
+duplicate = p